8444 + Interview Questions in Primary School in Physics Page 67 InterviewSolution

3301.	Statement l: Cones are sensitive to bright light.Statement II: Rods are sensitive to dim light.a-Statement is correctb-Statement Il is correctc-Both the statements arecorrectd-Both the statement are incorrect
Answer» C- Both the STATEMENTS are CORRECT

3301.

Statement l: Cones are sensitive to bright light.Statement II: Rods are sensitive to dim light.a-Statement is correctb-Statement Il is correctc-Both the statements arecorrectd-Both the statement are incorrect

Answer»

C- Both the STATEMENTS are CORRECT

Discussion

3302.	Ferrari Spider has a maximum acceleration of 10 m/s^2 and a top speed of 250 m/s. Find the time it would take to complete 4km starting from rest.
Answer» ANSWER: SH SHG xbxix nksisnj Explanation: jsndud

3302.

Ferrari Spider has a maximum acceleration of 10 m/s^2 and a top speed of 250 m/s. Find the time it would take to complete 4km starting from rest.

Answer»

ANSWER:

SH SHG xbxix nksisnj

Explanation:

jsndud

Discussion

3303.	Write the name of four devices each of which runs of:mains only and battery only
Answer» ANSWER: electric KETTLE , iron PRESS, calculator , toaster, mobile phone , WASHING machine , radio, TRANSISTOR, computer, microwave oven remote toys car torch wall watch happy to help :) please mark as brainliest Explanation:

3303.

Write the name of four devices each of which runs of:mains only and battery only

Answer»

ANSWER:

electric KETTLE , iron PRESS, calculator , toaster, mobile phone , WASHING machine , radio, TRANSISTOR, computer, microwave oven remote

toys car

torch wall

watch

happy to help :)

please mark as brainliest

Explanation:

Discussion

3304.	On the application of force on a wooden block, it moves closer to us. The force so applied is the force of_____options÷ 1) Consequential2) Gravitation3) Shape4) Pull5) Sail boat
Answer» ANSWER: PULL FORCE is the force when re pull any OBJECT TOWARDS ourselves

3304.

On the application of force on a wooden block, it moves closer to us. The force so applied is the force of_____options÷ 1) Consequential2) Gravitation3) Shape4) Pull5) Sail boat

Answer»

ANSWER:

PULL FORCE is the force when re pull any OBJECT TOWARDS ourselves

Discussion

3305.	Soft drink cans are usually electroplated with tin because:a-Tin is economical.b-Tin is a shinny metal.c-Tin is less reactive.d-Tin is more reactive.
Answer» ANSWER: tin is less reactive Explanation: it's my PLEASURE to help you *PLEASE* *MARK* me as *a brainliest.*

3305.

Soft drink cans are usually electroplated with tin because:a-Tin is economical.b-Tin is a shinny metal.c-Tin is less reactive.d-Tin is more reactive.

Answer»

ANSWER:

tin is less reactive

Explanation:

it's my PLEASURE to help you

PLEASE MARK me as a brainliest.

Discussion

3306.	(4)એક બિંદુવત વિદ્યુતભાર ને L બાજુઓ ધરાવતા સમઘનના કેન્દ્ર પર મુકેલ છે. સમઘનમાંથીબહાર આવતું ફલક્સ62 L(A) q€,(B) શૂન્ય(C)(D) 61,
Answer» ANSWER: I don't KNOW so SORRY for not ANSWERING

3306.

(4)એક બિંદુવત વિદ્યુતભાર ને L બાજુઓ ધરાવતા સમઘનના કેન્દ્ર પર મુકેલ છે. સમઘનમાંથીબહાર આવતું ફલક્સ62 L(A) q€,(B) શૂન્ય(C)(D) 61,

Answer»

ANSWER:

I don't KNOW so SORRY for not ANSWERING

Discussion

3307.	When the electric current is passed through a conductingsolution, there is a change of colour of the solution. Thisindicatesa-The heating effect of current. b-The magnetic effect of current.c-The chemical effect of current.d-The lighting effect of current. .*pls give right ans ill mark u brainlist 1000000%
Answer» C- CHEMICAL EFFECT of ELECTRIC CURRENT

Discussion

3308.	છે એ ક તંત્રમાં બે વિદ્યુતભારોથી 9 = 2.5 x 10° C અને H = 2.5 X 10 C અનુક્રમે A. (0, 0-15 cm)અને q (0,0, + 15 cm) બિંદુઓએ રહેલા છે. તંત્રની વિદ્યુત ડાઈપોલ ચા કે માત્રા Cm.A) 7.5 x 1 0(B) 3, 75 x 1 0(C) 1.25 x 1 0(D) 2 5 x 1 0
Answer» EXPLANATION: re5rrer5rst4tdge5tstrtet

3308.

છે એ ક તંત્રમાં બે વિદ્યુતભારોથી 9 = 2.5 x 10° C અને H = 2.5 X 10 C અનુક્રમે A. (0, 0-15 cm)અને q (0,0, + 15 cm) બિંદુઓએ રહેલા છે. તંત્રની વિદ્યુત ડાઈપોલ ચા કે માત્રા Cm.A) 7.5 x 1 0(B) 3, 75 x 1 0(C) 1.25 x 1 0(D) 2 5 x 1 0

Answer»

EXPLANATION:

re5rrer5rst4tdge5tstrtet

Discussion

3309.	Two steel spheres approach each other head-on with the same speed and collide elastically. After the collision one of the spheres of radius r comes to rest,the radius of other sphere is
Answer» Answer Option 'A' is correct Let us consider m 1 & m 2 are masses of the sphere and VELOCITY is v of the sphere before collision 'v' is the velocity of other sphere and FIST sphere at rest after collision. From conservation of energy 2 1 m 1 v 1 2 + 2 1 m 2 v 2 2 = 2 1 m 1 v 1 2 + 2 1 m 2 v 2 2 2 1 m 1 v 2 + 2 1 m 2 v 2 = 2 1 m 2 v ′2 ....(1) 2 1 m 1 v 2 − 2 1 m 2 v 2 = 2 1 m 2 v ′2 v ′ = m 2 n(m 1 −m 2 ) Put the value of v ′ in eq (1) 2 1 m 1 v 2 + 2 1 m 2 v 2 = 2 1 m 2 ×( m 2 v(m 1 −m 2 ) ) 2 m 1 +m 2 = m 2 (m 1 −m 2 ) 2 m 1 m 2 +m 2 2 =m 1 2 +m 2 2 −2m 1 m 2 m 2 = 3 m 1 ...(2) The volume of the fiist sphere is v and the volume of other is v/3 Now, the radius of the sphere is r and other sphere is r ′ The volume of first sphere is 3 4 πr ′ 3= 3 v ...(3) the volume of radius other sphere is 3 4 πr ′ 3= 3 v ....(4) DIVIDE eq. (4) by (3) r ′ = (3) 3 1 r

3309.

Two steel spheres approach each other head-on with the same speed and collide elastically. After the collision one of the spheres of radius r comes to rest,the radius of other sphere is

Answer»

Answer

Option 'A' is correct

Let us consider m

1

& m

2

are masses of the sphere and VELOCITY is v of the sphere before collision 'v' is the velocity of other sphere and FIST sphere at rest after collision.

From conservation of energy

2

1

m

1

v

1

2

+

2

1

m

2

v

2

=

2

1

m

1

v

1

2

+

2

1

m

2

v

2

1

m

1

v

2

+

2

1

m

2

v

2

=

2

1

m

2

v

′2

....(1)

2

1

m

1

v

2

−

2

1

m

2

v

2

=

2

1

m

2

v

′2

v

′

=

m

2

n(m

1

−m

2

)

Put the value of v

′

in eq (1)

2

1

m

1

v

2

+

2

1

m

2

v

2

=

2

1

m

2

×(

m

2

v(m

1

−m

2

)

2

m

1

+m

2

=

m

2

(m

1

−m

2

)

2

m

1

m

2

+m

2

=m

1

2

+m

2

−2m

1

m

2

m

2

=

3

m

1

...(2)

The volume of the fiist sphere is v and the volume of other is v/3

Now, the radius of the sphere is r and other sphere is r

′

The volume of first sphere is

3

4

πr

′

3=

3

v

...(3)

the volume of radius other sphere is

3

4

πr

′

3=

3

v

....(4)

DIVIDE eq. (4) by (3)

r

′

=

(3)

3

1

r

Discussion

3310.	Astonomers collect data from telescope Is this a primary data of secondary data
Answer» DATA COLLECTED from TELESCOPE is CALLED PRIMARY data .

3310.

Astonomers collect data from telescope Is this a primary data of secondary data

Answer»

DATA COLLECTED from TELESCOPE is CALLED PRIMARY data .

Discussion

3311.	a body of mass 0.5kg is moving at a constant velocity of 2m/s. To bring it to rest in 2m, the work done is
Answer» Answer: body of MASS 0.5 KG e is MOVING at a CONSTANT velocity of 2 metre per second thank you

3311.

a body of mass 0.5kg is moving at a constant velocity of 2m/s. To bring it to rest in 2m, the work done is

Answer»

Answer:

body of MASS 0.5 KG e is MOVING at a CONSTANT velocity of 2 metre per second thank you

Discussion

3312.	7.) If an engine of a vehicle applies 500DN onthe vehicle at rest Calculaté the timerequired to attain velocity of 50kh/hr, ifmass Vehicle is 500kg and fictional forcebetween road and vehicle is 500 N
Answer» If an engine of a VEHICLE applies 500DN on the vehicle at rest Calculaté the time required to ATTAIN velocity of 50kh/hr, if mass Vehicle is 500kg and fictional force between road and vehicle is 500 N Answer: 400N

3312.

7.) If an engine of a vehicle applies 500DN onthe vehicle at rest Calculaté the timerequired to attain velocity of 50kh/hr, ifmass Vehicle is 500kg and fictional forcebetween road and vehicle is 500 N

Answer»

If an engine of a VEHICLE applies 500DN on

the vehicle at rest Calculaté the time

required to ATTAIN velocity of 50kh/hr, if

mass Vehicle is 500kg and fictional force

between road and vehicle is 500 N

Answer:

400N

Discussion

3313.	Need solution for this !!
Answer» ★ Concept :- Here the concept of Power of the heart has been used. We see that we are given the volume of discharge of blood. Even we are given the OUTPUT power of the heart, height of blood to be lifted and density of the blood. So firstly using the relationship of power in terms of differentiation, we can find the exact formula of power REQUIRED to us and then find the exact power. Then we can compare it with given power and then find the answer. Let's do it !! ________________________________ ★ Formula Used :- $\;\boxed{\sf{\pink{Power\;=\;\bf{\dfrac{dm}{dt}\:g\:h}}}}$ $\;\boxed{\sf{\pink{\dfrac{dm}{dt}\;=\;\bf{\rho \dfrac{dV}{dt}}}}}$ ________________________________ ★ Solution :- Given, » Amount of blood discharged by heart = V = 7500 L PER day » Height to which blood is lifted = h = 1.63 m » Density of blood = ρ = 1.05 × 10³ Kg m⁻³ » Given power of heart = P' = 148/10ⁿ W = 148 × 10⁻ⁿ W » Time taken = t = 1 day = 24 × 60 × 60 sec » Acceleration DUE to gravity = g = 10 m/sec² ----------------------------------------------------------- ~ For the actual power of the heart, P :: Let the actual power of heart be P . We know that, $\;\sf{\rightarrow\;\;Power\;=\;\bf{\dfrac{dm}{dt}\:g\:h}}$ And we also know that, $\;\sf{\rightarrow\;\;\dfrac{dm}{dt}\;=\;\bf{\rho \dfrac{dV}{dt}}}$ By combining these both equations we get, $\;\sf{\rightarrow\;\;Power\;=\;\bf{\rho\:\dfrac{dV}{dt}\:g\:h}}$ By applying values in this equation, we get $\;\sf{\rightarrow\;\;Power,\;P\;=\;\bf{\dfrac{1.05\:\times\:10^{3}\:\times\:7500\:\times\:10^{-3}\:\times\:10\:\times\:1.63}{24\:\times\:60\:\times\:60}}}$ $\;\sf{\rightarrow\;\;Power,\;P\;=\;\bf{\dfrac{1.05\:\times\:10^{3}\:\times\:7500\:\times\:10^{-3}\:\times\:10\:\times\:1.63}{24\:\times\:60\:\times\:60}}}$ Cancelling the unlike terms, we get $\;\sf{\rightarrow\;\;Power,\;P\;=\;\bf{\dfrac{1.05\:\times\:7500\:\times\:10\:\times\:1.63}{24\:\times\:60\:\times\:60}}}$ $\;\sf{\rightarrow\;\;Power,\;P\;=\;\bf{\dfrac{128362.5}{86400}}}$ $\;\bf{\rightarrow\;\;Power,\;P\;=\;\bf{\red{1.48\:\:W}}}$ Here W = Watt This is the actual power of the heart. ----------------------------------------------------------- ~ For the value of n :: We know that, • Actual Power = Given Power • P = P' Then, it will be → 1.48 = 148 × 10⁻ⁿ → 10⁻ⁿ = 1.48 / 148 → 10ⁿ = 148/1.48 → 10ⁿ = 100 → 10ⁿ = 10² By laws of Exponents and COMPARING LHS and RHS, we get → n = 2 $\;\underline{\boxed{\tt{Hence,\;\:value\;\:of\;\:n\;=\;\bf{\purple{2}}}}}$ ________________________________ ★ More to know :- $\;\tt{\leadsto\;\;Momentum\;=\;Mass\:\times\:Velocity}$ $\;\tt{\leadsto\;\;Force\;=\;Mass\:\times\:Acceleration}$ $\;\tt{\leadsto\;\;Work\;=\;Force\:\times\:Distance}$ $\;\tt{\leadsto\;\; Impulse\;of\;Force\;=\;Force\:\times\:Time}$ $\;\tt{\leadsto\;\;Power\;=\;\dfrac{Work}{Time}}$

3313.

Need solution for this !!

Answer»

★ Concept :-

Here the concept of Power of the heart has been used. We see that we are given the volume of discharge of blood. Even we are given the OUTPUT power of the heart, height of blood to be lifted and density of the blood. So firstly using the relationship of power in terms of differentiation, we can find the exact formula of power REQUIRED to us and then find the exact power. Then we can compare it with given power and then find the answer.

Let's do it !!

________________________________

★ Formula Used :-

$\;\boxed{\sf{\pink{Power\;=\;\bf{\dfrac{dm}{dt}\:g\:h}}}}$

$\;\boxed{\sf{\pink{\dfrac{dm}{dt}\;=\;\bf{\rho \dfrac{dV}{dt}}}}}$

________________________________

★ Solution :-

Given,

» Amount of blood discharged by heart = V = 7500 L PER day

» Height to which blood is lifted = h = 1.63 m

» Density of blood = ρ = 1.05 × 10³ Kg m⁻³

» Given power of heart = P' = 148/10ⁿ W = 148 × 10⁻ⁿ W

» Time taken = t = 1 day = 24 × 60 × 60 sec

» Acceleration DUE to gravity = g = 10 m/sec²

-----------------------------------------------------------

~ For the actual power of the heart, P ::

Let the actual power of heart be P .

We know that,

$\;\sf{\rightarrow\;\;Power\;=\;\bf{\dfrac{dm}{dt}\:g\:h}}$

And we also know that,

$\;\sf{\rightarrow\;\;\dfrac{dm}{dt}\;=\;\bf{\rho \dfrac{dV}{dt}}}$

By combining these both equations we get,

$\;\sf{\rightarrow\;\;Power\;=\;\bf{\rho\:\dfrac{dV}{dt}\:g\:h}}$

By applying values in this equation, we get

$\;\sf{\rightarrow\;\;Power,\;P\;=\;\bf{\dfrac{1.05\:\times\:10^{3}\:\times\:7500\:\times\:10^{-3}\:\times\:10\:\times\:1.63}{24\:\times\:60\:\times\:60}}}$

Cancelling the unlike terms, we get

$\;\sf{\rightarrow\;\;Power,\;P\;=\;\bf{\dfrac{1.05\:\times\:7500\:\times\:10\:\times\:1.63}{24\:\times\:60\:\times\:60}}}$

$\;\sf{\rightarrow\;\;Power,\;P\;=\;\bf{\dfrac{128362.5}{86400}}}$

$\;\bf{\rightarrow\;\;Power,\;P\;=\;\bf{\red{1.48\:\:W}}}$

Here W = Watt

This is the actual power of the heart.

-----------------------------------------------------------

~ For the value of n ::

We know that,

• Actual Power = Given Power

• P = P'

Then, it will be

→ 1.48 = 148 × 10⁻ⁿ

→ 10⁻ⁿ = 1.48 / 148

→ 10ⁿ = 148/1.48

→ 10ⁿ = 100

→ 10ⁿ = 10²

By laws of Exponents and COMPARING LHS and RHS, we get

→ n = 2

$\;\underline{\boxed{\tt{Hence,\;\:value\;\:of\;\:n\;=\;\bf{\purple{2}}}}}$

________________________________

★ More to know :-

$\;\tt{\leadsto\;\;Momentum\;=\;Mass\:\times\:Velocity}$

$\;\tt{\leadsto\;\;Force\;=\;Mass\:\times\:Acceleration}$

$\;\tt{\leadsto\;\;Work\;=\;Force\:\times\:Distance}$

$\;\tt{\leadsto\;\; Impulse\;of\;Force\;=\;Force\:\times\:Time}$

$\;\tt{\leadsto\;\;Power\;=\;\dfrac{Work}{Time}}$

Discussion

3314.	(6) How do we see the image of the Moon in water?
Answer» Answer: The LIGHT from the moon HITS the WATER and forms an IMAGE on it and then that light is reflected to our eyes and we are able to see it Explanation: please mark me as a BRAINIEST

3314.

(6) How do we see the image of the Moon in water?

Answer»

Answer:

The LIGHT from the moon HITS the WATER and forms an IMAGE on it and then that light is reflected to our eyes and we are able to see it

Explanation:

please mark me as a BRAINIEST

Discussion

3315.	A bullet of mass 10 g travelling horizontally with a velocity of 150 m/s collides with and sticks to a stationary wooden block of mass5 kg . Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also calculate the velocity of the combined objects.
Answer» ANSWER: what is the imposter LEFT a MESSAGE via Yahoo and msn and other JOB to do you

3315.

A bullet of mass 10 g travelling horizontally with a velocity of 150 m/s collides with and sticks to a stationary wooden block of mass5 kg . Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also calculate the velocity of the combined objects.

Answer»

ANSWER:

what is the imposter LEFT a MESSAGE via Yahoo and msn and other JOB to do you

Discussion

3316.	What will happen when cotton towel and copper pipe are rubbed together?
Answer» On rubbing a copper rod with cloth is becomes POSITIVELY charged. It gets charged due to friction, therefore, it will start attracting small bits of paper as it ACQUIRES a small number of electrostatic CHARGES. HOWEVER, it lasts only for a small period of time and soon the rod loses all its charge.

Discussion

3317.	Describe an experiment to measure frictionbetween two solid surfaces.
Answer» EXPLANATION: ANSWER in attachment REFER to that

3317.

Describe an experiment to measure frictionbetween two solid surfaces.

Answer»

EXPLANATION:

ANSWER in attachment

REFER to that

Discussion

3318.	Write the formula of calculating number of moles when the molecular mass is given.Don't want any funny answer.
Answer» Answer: So in order to calculate the number of MOLES of any substance present in the SAMPLE, we simply DIVIDE the given weight of the substance by its molar mass. Where 'n' is the number of moles, 'm' is the given mass and 'M' is the molar mass.

3318.

Write the formula of calculating number of moles when the molecular mass is given.Don't want any funny answer.

Answer»

Answer:

So in order to calculate the number of MOLES of any substance present in the SAMPLE, we simply DIVIDE the given weight of the substance by its molar mass. Where 'n' is the number of moles, 'm' is the given mass and 'M' is the molar mass.

Discussion

3319.	A bullet of mass 10 g travelling horizontally with a velocity of150 m s' strikes a stationary wooden block and comes to restin 0.03 s. Calculate the distance of penetration of the bulletinto the block. Also calculate the magnitude of the force exertedby the wooden block on the bullet.
Answer» Given :- ● A bullet of mass 10g moving with a velocity of 150m/s ● A bullet COMES to rest in 0.03 s Solution :- Here, Initial velocity of bullet ( u ) = 150 m/s Final velocity of bullet ( v ) = 0 ( it comes to at rest position) Time taken by the bullet to come to at rest position ( t) = 0.03 s Now, By using first equation of motion, v = u + at Put the required values, 0 = 150 + a * 0.03 0 = 150 + 0.03a -0.03a = 150 a = 150/-0.03 a = -5000m/s^2 ( Negative sign indicates that the velocity of bullet is decreasing) Thus, The acceleration of bullet is -5000m/s^2 Now, ( We have to find distance of penetration of the bullet into block) Therefore, By using THIRD equation of motion 2as = v^2 - u^2 2( -5000) s = 0 - ( 150)^2 -10000s = -22500 s = -22500/-10000 s = 2.25m Thus, The distance of penetration of the bullet into the block is 2.25m Now, ( We have to calculate the magnitude) As we KNOW that, F = mass acceleration Here, Mass = 10g = 0.01kg ( SI unit of mass is kg) Acceleration = 5000 ( Acceleration be taken in positive because we have to find the magnitude) Therefore, Force = 0.01 * 5000 Force = 50N Hence, The magnitude of the force exerted by the wooden block on the bullet is 50N $.$ Three EQUATIONS of motion are :- ● v = u + at ● S = UT + 1/2at^2 ● 2as = v^2 - u^2

3319.

A bullet of mass 10 g travelling horizontally with a velocity of150 m s' strikes a stationary wooden block and comes to restin 0.03 s. Calculate the distance of penetration of the bulletinto the block. Also calculate the magnitude of the force exertedby the wooden block on the bullet.

Answer»

Given :-

● A bullet of mass 10g moving with a velocity of 150m/s

● A bullet COMES to rest in 0.03 s

Solution :-

Here,

Initial velocity of bullet ( u ) = 150 m/s

Final velocity of bullet ( v ) = 0

( it comes to at rest position)

Time taken by the bullet to come to at rest position ( t) = 0.03 s

Now,

By using first equation of motion,

v = u + at

Put the required values,

0 = 150 + a * 0.03

0 = 150 + 0.03a

-0.03a = 150

a = 150/-0.03

a = -5000m/s^2

( Negative sign indicates that the velocity of bullet is decreasing)

Thus, The acceleration of bullet is -5000m/s^2

Now,

( We have to find distance of penetration of the bullet into block)

Therefore,

By using THIRD equation of motion

2as = v^2 - u^2

2( -5000) *s = 0 - ( 150)^2

-10000s = -22500

s = -22500/-10000

s = 2.25m

Thus, The distance of penetration of the bullet into the block is 2.25m

Now,

( We have to calculate the magnitude)

As we KNOW that,

F = mass * acceleration

Here,

Mass = 10g = 0.01kg

( SI unit of mass is kg)

Acceleration = 5000

( Acceleration be taken in positive because we have to find the magnitude)

Therefore,

Force = 0.01 * 5000

Force = 50N

Hence, The magnitude of the force exerted by the wooden block on the bullet is 50N $.$

Three EQUATIONS of motion are :-

● v = u + at

● S = UT + 1/2at^2

● 2as = v^2 - u^2

Discussion

3320.	Sharon takes 20 minutes to cover a distance of 3.6 kilometres on a bicycle. Calculate her speed in units ofkilometre/hour and metre/second.What is the
Answer» ANSWER: Time=20 MIN=20 × 60 =1200 Seconds Distance = 3.6 KM =3.6 × 1000 =3600 M The SPEED for now will be =DISTANCE/TIME =3600/1200 =3m/s

3320.

Sharon takes 20 minutes to cover a distance of 3.6 kilometres on a bicycle. Calculate her speed in units ofkilometre/hour and metre/second.What is the

Answer»

ANSWER:

Time=20 MIN=20 × 60 =1200 Seconds

Distance = 3.6 KM =3.6 × 1000 =3600 M

The SPEED for now will be

=DISTANCE/TIME

=3600/1200

=3m/s

Discussion

3321.	The maximum displacement of a body from its mean position is calledamplitudeoscillationperiodic motionfrequency
Answer» ANSWER: AMPLITUDE IS THE ANSWER

3321.

The maximum displacement of a body from its mean position is calledamplitudeoscillationperiodic motionfrequency

Answer»

ANSWER:

AMPLITUDE IS THE ANSWER

Discussion

3322.	The number of vibrations made by a vibrating body in one second is1} frequency2} noise3} loudness4} pitch
Answer» Answer: frequency Explanation: The NUMBER of cycles that a VIBRATING object completes in one second is CALLED frequency. The UNIT of frequency is hertz (HZ). I hope it will help you ✌️

3322.

The number of vibrations made by a vibrating body in one second is1} frequency2} noise3} loudness4} pitch

Answer»

Answer:

frequency

Explanation:

The NUMBER of cycles that a VIBRATING object completes in one second is CALLED frequency. The UNIT of frequency is hertz (HZ).

I hope it will help you ✌️

Discussion

3323.	A pendulum oscillates 20 times in 4 seconds. Find its time period1] 0.05 sec.2] 0.001 sec.3] 0.2 sec.4] 0.1 sec
Answer» ANSWER: time/second Explanation: 20/4= 5 PLZ MARK me as BRILLIANT

3323.

A pendulum oscillates 20 times in 4 seconds. Find its time period1] 0.05 sec.2] 0.001 sec.3] 0.2 sec.4] 0.1 sec

Answer»

ANSWER:

time/second

Explanation:

20/4= 5

PLZ MARK me as BRILLIANT

Discussion

3324.	Name the symbols ? which is in electric circuit.
Answer» EXPLANATION: hua and a few months BACK on TRACK down the stairs in your

3324.

Name the symbols ? which is in electric circuit.

Answer»

EXPLANATION:

hua and a few months BACK on TRACK down the stairs in your

Discussion

3325.	A device used for measuring short time intervals.i) sand clockii) sundialiii) pendulum clockiv) quartz clock
Answer» ANSWER: *sand clock* Hope it will help you PLEASE MARK brainliest if it helps

3325.

A device used for measuring short time intervals.i) sand clockii) sundialiii) pendulum clockiv) quartz clock

Answer»

ANSWER:

sand clock

Hope it will help you PLEASE MARK brainliest if it helps

Discussion

3326.	Motion depicted by curved distance-time line graph isi) uniform motionii) non uniform motioniii) none of these
Answer» Answer: UNIFORM MOTION Explanation: HOPE it will help you

3326.

Motion depicted by curved distance-time line graph isi) uniform motionii) non uniform motioniii) none of these

Answer»

Answer:

UNIFORM MOTION

Explanation:

HOPE it will help you

Discussion

3327.	Three ants are located at the vertices of an equilateral triangle whose sides equal to d=3m they allstart moving simultaneously with speed V = 1m/s with the first ant heading continually for thesecond the second for the third and the third for the first how soon will the ants meet? (in second)Bach
Answer» ANSWER: hello how are you good morning Explanation: my NE is biresh I am from madhya PRADESH

3327.

Three ants are located at the vertices of an equilateral triangle whose sides equal to d=3m they allstart moving simultaneously with speed V = 1m/s with the first ant heading continually for thesecond the second for the third and the third for the first how soon will the ants meet? (in second)Bach

Answer»

ANSWER:

hello how are you good morning

Explanation:

my NE is biresh I am from madhya PRADESH

Discussion

3328.	A ray of light is incident on a mirror at an angle of 40°. What is the angle of incidence
Answer» Explanation: incident angle is 40° and angle of REFLECTION will be 40° to the normal of the MIRROR surface

3328.

A ray of light is incident on a mirror at an angle of 40°. What is the angle of incidence

Answer»

Explanation:

incident angle is 40°

and angle of REFLECTION will be 40° to the normal of the MIRROR surface

Discussion

3329.	Draw a diagram to show how a small bar magnet suspended by a nylon thread will come to rest and lebel all the things
Answer» The DIAGRAM is LIKE this

3329.

Draw a diagram to show how a small bar magnet suspended by a nylon thread will come to rest and lebel all the things

Answer»

The DIAGRAM is LIKE this

Discussion

3330.	Describe how we calculated time period of a simple pendulum.Before answering pls include this ✓no copied answer ✓ answer should be more than 100 words ✓ include diagrams if you needed✓ dont be a spammer
Answer» Calculate the period of oscillations according to the formula above: T = 2π√(L/g) = 2π * √(2/9.80665) = 2.837 s . FIND the frequency as the reciprocal of the period: f = 1/T = 0.352 HZ . You can also let this simple pendulum calculator PERFORM all CALCULATIONS for you! EXPLANATION: Hope it's help you (:

3330.

Describe how we calculated time period of a simple pendulum.Before answering pls include this ✓no copied answer ✓ answer should be more than 100 words ✓ include diagrams if you needed✓ dont be a spammer

Answer»

Calculate the period of oscillations according to the formula above: T = 2π√(L/g) = 2π * √(2/9.80665) = 2.837 s . FIND the frequency as the reciprocal of the period: f = 1/T = 0.352 HZ . You can also let this simple pendulum calculator PERFORM all CALCULATIONS for you!

EXPLANATION:

Hope it's help you (:

Discussion

3331.	Circle the odd one out give reasons for your choice. soils in regions containing sand stone, clay, peat chalk.
Answer» ANSWER: Answer is SOILS in REGION containing Sand STONE

3331.

Circle the odd one out give reasons for your choice. soils in regions containing sand stone, clay, peat chalk.

Answer»

ANSWER:

Answer is SOILS in REGION containing Sand STONE

Discussion

3332.	Explain stress in physics please
Answer» In physics, stress is the force acting on the unit area of a material. The EFFECT of stress on a body is named as strain. Stress can deform the body. How much force material experience can be MEASURED using stress units.

3332.

Explain stress in physics please

Answer»

In physics, stress is the force acting on the unit area of a material. The EFFECT of stress on a body is named as strain. Stress can deform the body. How much force material experience can be MEASURED using stress units.

Discussion

3333.	Please answer this question with the correct answer.
Answer» ANSWER: OPTION B is CORRECT. only option b

3333.

Please answer this question with the correct answer.

Answer»

ANSWER:

OPTION B is CORRECT. only option b

Discussion

3334.	What is the difference between AC and DC current
Answer» Ac CURRENT changes its direction during flow while the DC current does not changes its direction during flow and remains constant. The AC load can be CAPACITIVE, inductive or resistive but the load on DC is ALWAYS resistive. Flw_Me!

3334.

What is the difference between AC and DC current

Answer»

Ac CURRENT changes its direction during flow while the DC current does not changes its direction during flow and remains constant. The AC load can be CAPACITIVE, inductive or resistive but the load on DC is ALWAYS resistive.

Flw_Me!

Discussion

3335.	Classify magnets based on: a) how long the magnetism lasts,. b) how they are made of
Answer» ANSWER: magnets are CLASSIFYING in to 2 bar magnets & linear magnets it's is made of FERROMAGNETIC SUBSTANCE

3335.

Classify magnets based on: a) how long the magnetism lasts,. b) how they are made of

Answer»

ANSWER:

magnets are CLASSIFYING in to 2

bar magnets & linear magnets

it's is made of FERROMAGNETIC SUBSTANCE

Discussion

3336.	~Don't spamGive correct answer ✔️
Answer» ANSWER: CARBON DIOXIDE as METAL CARBONATES

3336.

~Don't spamGive correct answer ✔️

Answer»

ANSWER:

CARBON DIOXIDE as METAL CARBONATES

Discussion

3337.	2.The time taken for one to and fro movement is called________3.The electronic watches use the vibrations of_______crystal.5.___________in the car gives the distance travelled in kilometers.6. The speed of an aircraft is measured in the unit________7.__________is an early device used to tell the time of the day.please answer this question with the correct answer please..
Answer» Answer: 2. ONE oscillation Explanation:

3337.

2.The time taken for one to and fro movement is called____3.The electronic watches use the vibrations of_crystal.5._in the car gives the distance travelled in kilometers.6. The speed of an aircraft is measured in the unit7.__is an early device used to tell the time of the day.please answer this question with the correct answer please..

Answer»

Answer:

2. ONE oscillation

Explanation:

Discussion

3338.	1)A bus travels with a speed of 65 km/he. how long does it take to travel a distance of 780 km?2)if a car travels a distance of 236 km in 4 hours, find its speed?3) Raju rides a bicycle at a speed of 20 m/s. how far does he travel in 35 seconds?4) A train travels at a speed of 92 km/HR. if it leaves the first station at 8.15 a.m and reaches the next station at 10.15 a.m, find the distance between two stations. please answer this question with the correct answer
Answer» 1. 12 HOURS 2. 509km/hr 3. 700m/s 4. 1980km/hr

3338.

1)A bus travels with a speed of 65 km/he. how long does it take to travel a distance of 780 km?2)if a car travels a distance of 236 km in 4 hours, find its speed?3) Raju rides a bicycle at a speed of 20 m/s. how far does he travel in 35 seconds?4) A train travels at a speed of 92 km/HR. if it leaves the first station at 8.15 a.m and reaches the next station at 10.15 a.m, find the distance between two stations. please answer this question with the correct answer

Answer»

1. 12 HOURS

2. 509km/hr

3. 700m/s

4. 1980km/hr

Discussion

3339.	1. 1 century=_________decades2.The time taken for one to and fro movement is called________3.The electronic watches use the vibrations of_______crystal.4. The SI unit of time is______5.___________in the car gives the distance travelled in kilometers.6. The speed of an aircraft is measured in the unit________7.__________is an early device used to tell the time of the day.please answer this question with the correct answer please..
Answer» Answer: 1 CENTURY is EQUAL to 1P DECADES

3339.

1. 1 century=_____decades2.The time taken for one to and fro movement is called3.The electronic watches use the vibrations of_crystal.4. The SI unit of time is5._in the car gives the distance travelled in kilometers.6. The speed of an aircraft is measured in the unit7.____is an early device used to tell the time of the day.please answer this question with the correct answer please..

Answer»

Answer:

1 CENTURY is EQUAL to 1P DECADES

Discussion

3340.	An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.!no spam¡
Answer» ANSWER: no EXPLANATION: because the wires are MADE up of ELECTRIC conductors....which can be a cause of SHOCKS

3340.

An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.!no spam¡

Answer»

ANSWER:

no

EXPLANATION:

because the wires are MADE up of ELECTRIC conductors....which can be a cause of SHOCKS

Discussion

3341.	Diffrence between clinical themometer and labour themometer
Answer» ANSWER: Clinical Thermometer is meant for clinical purposes. It is developed for measuring the human body temperature. A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature. plz MARK me as BRAINLIEST

3341.

Diffrence between clinical themometer and labour themometer

Answer»

ANSWER:

Clinical Thermometer is meant for clinical purposes. It is developed for measuring the human body temperature. A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature.

plz MARK me as BRAINLIEST

Discussion

3342.	explain with the help of activity that sound is created by a rubber band due to vibration? Draw diagram to clarify
Answer» ANSWER: take a rubber band and STECH it and move it with consentati on we see the SOUND created

3342.

explain with the help of activity that sound is created by a rubber band due to vibration? Draw diagram to clarify

Answer»

ANSWER:

take a rubber band and STECH it and move it with consentati on we see the SOUND created

Discussion

3343.	What is the meanging of pagal
Answer» ANSWER: MENTALITY AFFECTED DIMAG KHARAB

3343.

What is the meanging of pagal

Answer»

ANSWER:

MENTALITY AFFECTED DIMAG KHARAB

Discussion

3344.	What is equipotential surface..
Answer» Answer: Any SURFACE over which the POTENTIAL is CONSTANT is CALLED an equipotential surface.

3344.

What is equipotential surface..

Answer»

Answer:

Any SURFACE over which the POTENTIAL is CONSTANT is CALLED an equipotential surface.

Discussion

3345.	A force of 500N is creating a pressure of 25Pa on a surface. Calculate the area of the surface
Answer» Answer: 20 m² Explanation: Force (F) = 500 N Pressure (P) = 25 Pa P = F / A 25 = 500 / A A = 500 / 25 Area = 20 m²

3345.

A force of 500N is creating a pressure of 25Pa on a surface. Calculate the area of the surface

Answer»

Answer:

20 m²

Explanation:

Force (F) = 500 N

Pressure (P) = 25 Pa

P = F / A

25 = 500 / A

A = 500 / 25

Area = 20 m²

Discussion

3346.	Is intermolecular force in solids,which undergo sublimation, more or comparatively less?Give reasonplz tell the answerplzzzzzzzz...............................................................
Answer» ANSWER: the inter-molecular forces in the substance. ... This happens because the vapour pressure of some substances is higher when in the SOLID form than the LIQUID form. Vapour pressure is the pressure of the substance's vapour over the solid or liquid form when in equilibrium *hope* it *will* *HELP* *you* *and* *follow* me

3346.

Is intermolecular force in solids,which undergo sublimation, more or comparatively less?Give reasonplz tell the answerplzzzzzzzz...............................................................

Answer»

ANSWER:

the inter-molecular forces in the substance. ... This happens because the vapour pressure of some substances is higher when in the SOLID form than the LIQUID form. Vapour pressure is the pressure of the substance's vapour over the solid or liquid form when in equilibrium

hope it will HELP you and follow me

Discussion

3347.	Pressure is defined as
Answer» ANSWER: HEY MATE here is UR answer hope this will HELPFUL to you

3347.

Pressure is defined as

Answer»

ANSWER:

HEY MATE here is UR answer

hope this will HELPFUL to you

Discussion

3348.	Draw a graph showing the variation of T^2 with length
Answer» ANSWER: MARK me as BRAINLIEST and FOLLOW me

3348.

Draw a graph showing the variation of T^2 with length

Answer»

ANSWER:

MARK me as BRAINLIEST and FOLLOW me

Discussion

3349.	It expands equally for every degree of rise intemperature.
Answer» ANSWER: WRONG question Explanation:

3349.

It expands equally for every degree of rise intemperature.

Answer»

ANSWER:

WRONG question

Explanation:

Discussion

3350.	Fishes survive in ponds even when the atmospheric temperature is below 0°c. Explain.
Answer» Answer: DUE to they have cold BLOODED animals Explanation: as we KNOW the organisms which are cold blooded have the TENDENCY to change their body temperature so when water Temperature is less than 0°C then fish drop his body temperature and save himself from extreme cold temperatures of water

3350.

Fishes survive in ponds even when the atmospheric temperature is below 0°c. Explain.

Answer»

Answer:

DUE to they have cold BLOODED animals

Explanation:

as we KNOW the organisms which are cold blooded have the TENDENCY to change their body temperature so when water Temperature is less than 0°C then fish drop his body temperature and save himself from extreme cold temperatures of water

Discussion

Explore topic-wise InterviewSolutions in .

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(4)એક બિંદુવત વિદ્યુતભાર ને L બાજુઓ ધરાવતા સમઘનના કેન્દ્ર પર મુકેલ છે. સમઘનમાંથીબહાર આવતું ફલક્સ62 L(A) q€,(B) શૂન્ય(C)(D) 61,​

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Need solution for this !!​

★ Concept :-

★ Formula Used :-

★ Solution :-

• Actual Power = Given Power

→ n = 2

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ANSWER in attachment

Write the formula of calculating number of moles when the molecular mass is given.Don't want any funny answer. ​

A bullet of mass 10 g travelling horizontally with a velocity of150 m s' strikes a stationary wooden block and comes to restin 0.03 s. Calculate the distance of penetration of the bulletinto the block. Also calculate the magnitude of the force exertedby the wooden block on the bullet.​

Given :-

Solution :-

Now,

Put the required values,

Now,

By using THIRD equation of motion

Now,

As we KNOW that,

Here,

Therefore,

Hence, The magnitude of the force exerted by the wooden block on the bullet is 50N

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Please answer this question with the correct answer.​

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Flw_Me!

Classify magnets based on: a) how long the magnetism lasts,. b) how they are made of​

~Don't spamGive correct answer ✔️​

An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.!no spam¡

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explain with the help of activity that sound is created by a rubber band due to vibration? Draw diagram to clarify​

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Is intermolecular force in solids,which undergo sublimation, more or comparatively less?Give reasonplz tell the answerplzzzzzzzz...............................................................​

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Draw a graph showing the variation of T^2 with length​

It expands equally for every degree of rise intemperature.

Fishes survive in ponds even when the atmospheric temperature is below 0°c. Explain.

Statement l: Cones are sensitive to bright light.Statement II: Rods are sensitive to dim light.a-Statement is correctb-Statement Il is correctc-Both the statements arecorrectd-Both the statement are incorrect

On the application of force on a wooden block, it moves closer to us. The force so applied is the force of_____options÷ 1) Consequential2) Gravitation3) Shape4) Pull5) Sail boat

Soft drink cans are usually electroplated with tin because:a-Tin is economical.b-Tin is a shinny metal.c-Tin is less reactive.d-Tin is more reactive.

(4)એક બિંદુવત વિદ્યુતભાર ને L બાજુઓ ધરાવતા સમઘનના કેન્દ્ર પર મુકેલ છે. સમઘનમાંથીબહાર આવતું ફલક્સ62 L(A) q€,(B) શૂન્ય(C)(D) 61,

Two steel spheres approach each other head-on with the same speed and collide elastically. After the collision one of the spheres of radius r comes to rest,the radius of other sphere is

Astonomers collect data from telescope Is this a primary data of secondary data

a body of mass 0.5kg is moving at a constant velocity of 2m/s. To bring it to rest in 2m, the work done is

7.) If an engine of a vehicle applies 500DN onthe vehicle at rest Calculaté the timerequired to attain velocity of 50kh/hr, ifmass Vehicle is 500kg and fictional forcebetween road and vehicle is 500 N

Need solution for this !!

(6) How do we see the image of the Moon in water?

Describe an experiment to measure frictionbetween two solid surfaces.

Write the formula of calculating number of moles when the molecular mass is given.Don't want any funny answer.

A bullet of mass 10 g travelling horizontally with a velocity of150 m s' strikes a stationary wooden block and comes to restin 0.03 s. Calculate the distance of penetration of the bulletinto the block. Also calculate the magnitude of the force exertedby the wooden block on the bullet.

Hence, The magnitude of the force exerted by the wooden block on the bullet is 50N $.$

Sharon takes 20 minutes to cover a distance of 3.6 kilometres on a bicycle. Calculate her speed in units ofkilometre/hour and metre/second.What is the

Name the symbols ? which is in electric circuit.

A device used for measuring short time intervals.i) sand clockii) sundialiii) pendulum clockiv) quartz clock

Motion depicted by curved distance-time line graph isi) uniform motionii) non uniform motioniii) none of these

A ray of light is incident on a mirror at an angle of 40°. What is the angle of incidence

Draw a diagram to show how a small bar magnet suspended by a nylon thread will come to rest and lebel all the things

Describe how we calculated time period of a simple pendulum.Before answering pls include this ✓no copied answer ✓ answer should be more than 100 words ✓ include diagrams if you needed✓ dont be a spammer

Circle the odd one out give reasons for your choice. soils in regions containing sand stone, clay, peat chalk.

Please answer this question with the correct answer.

Classify magnets based on: a) how long the magnetism lasts,. b) how they are made of

~Don't spamGive correct answer ✔️

Diffrence between clinical themometer and labour themometer

explain with the help of activity that sound is created by a rubber band due to vibration? Draw diagram to clarify

What is the meanging of pagal

Is intermolecular force in solids,which undergo sublimation, more or comparatively less?Give reasonplz tell the answerplzzzzzzzz...............................................................

Pressure is defined as

Draw a graph showing the variation of T^2 with length