67486 + Interview Questions in Secondary School in Physics

1.	Radiocarbon is produced in the atmosphere as a result ofA. collision between fast neutrons and nitrogen nuclei present in the atmosphereB. action of ultraviolet light from the sun on atmospheric oxygenC. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphereD. lightning discharge in atmosphereThanks....
Answer» $\huge\bf\pink{{\mid{\overline{\underline{your\: answer}}}\mid}}$ Radiocarbon is produced in the atmosphere as a result of A. COLLISION between fast neutrons and nitrogen NUCLEI present in the atmosphere B. action of ULTRAVIOLET LIGHT from the sun on atmospheric oxygen C. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere D. lightning discharge in atmosphere ANSWER... Radiocarbon is produced in the atmosphere as a result of collision between fast neutrons and nitrogen nuclei present in the atmosphere THANKS❗❗

1.

Radiocarbon is produced in the atmosphere as a result ofA. collision between fast neutrons and nitrogen nuclei present in the atmosphereB. action of ultraviolet light from the sun on atmospheric oxygenC. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphereD. lightning discharge in atmosphereThanks....

Answer»

$\huge\bf\pink{{\mid{\overline{\underline{your\: answer}}}\mid}}$

Radiocarbon is produced in the atmosphere as a result of

A. COLLISION between fast neutrons and nitrogen NUCLEI present in the atmosphere

B. action of ULTRAVIOLET LIGHT from the sun on atmospheric oxygen

C. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere

D. lightning discharge in atmosphere

ANSWER...

Radiocarbon is produced in the atmosphere as a result of collision between fast neutrons and nitrogen nuclei present in the atmosphere

THANKS❗❗

Discussion

2.	A ball is gently dropped form ahieght of 20m if it's velocity increases uniformly at the rateof10m/swhat is the velocity strike the ground
Answer» Answer: 20m/s Explanation: PLEASE REFER to the PICTURE ATTACHED

2.

A ball is gently dropped form ahieght of 20m if it's velocity increases uniformly at the rateof10m/swhat is the velocity strike the ground

Answer»

Answer:

20m/s

Explanation:

PLEASE REFER to the PICTURE ATTACHED

Discussion

3.	Define corolis force
Answer» an EFFECT whereby a mass MOVING in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of ROTATION. On the earth, the effect tends to deflect moving objects to the right in the NORTHERN hemisphere and to the left in the southern and is important in the formation of cyclonic weather systems. ..please mark it a brainlist

Discussion

4.	Hello users...DREIVE FORMULA FOR 1/F IN THE PARAXIAL RAY..Plz FOLLOW ME
Answer» REFER THE IMAGE.. $\huge\bf\pink{{\mid{\overline{\underline{your\: answer}}}\mid}}$ A paraxial RAY is a ray that MAKES a small angle to the principal axis of the SYSTEM, and lies close to the axis throughout the system. THANKS❗❗

4.

Hello users...DREIVE FORMULA FOR 1/F IN THE PARAXIAL RAY..Plz FOLLOW ME

Answer»

REFER THE IMAGE..

$\huge\bf\pink{{\mid{\overline{\underline{your\: answer}}}\mid}}$

A paraxial RAY is a ray that MAKES a small angle to the principal axis of the SYSTEM, and lies close to the axis throughout the system.

THANKS❗❗

Discussion

5.	A body of mass 4 kg initially at rest is subjected to a force 16N .what is the K.E accquired by the body at the end of 10 s ?
Answer» @hey mate !! here is your ANSWER:- m=4kg, F=16N, t=10sec a=F/m =16/4 =4m/s^2 v=u+at =0+4×10 =40m/s The K.E of energy accquired by the BODY:---- K=1/2mv^2 = 1/2×4×(40)^2 = 3200J Thanks ❤ hope it's help you ✔✔

5.

A body of mass 4 kg initially at rest is subjected to a force 16N .what is the K.E accquired by the body at the end of 10 s ?

Answer»

@hey mate !!

here is your ANSWER:-

m=4kg, F=16N, t=10sec

a=F/m

=16/4

=4m/s^2

v=u+at

=0+4×10

=40m/s

The K.E of energy accquired by the BODY:----

K=1/2mv^2

= 1/2×4×(40)^2

= 3200J

Thanks ❤

hope it's help you ✔✔

Discussion

6.	What is period of time??
Answer» Explanation: a PERIOD of time during which someone or SOMETHING is tested. time FRAME. a time period during which something occurs or is expected to OCCUR.

6.

What is period of time??

Answer»

Explanation:

a PERIOD of time during which someone or SOMETHING is tested. time FRAME. a time period during which something occurs or is expected to OCCUR.

Discussion

7.	Find the angle between the vectors : vector a =3i - 4j and vector b = -2i+3k
Answer» $\:\:\:\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \huge\mathcal{\bf{{\underline{\underline{\huge\mathcal{...Answer...}}}}}}$ $\underline{\large\mathcal\red{solution}}$ a =3i - 4j and vector B = -2i+3k now ...\|a\|=√[(3)²+(-4)²]=5 and.....\|b\|=√[(-2)²+(3)²]=√13 now the DOT PRODUCT of a and b is a.b=-6-12=-18 the angle is $\cos {}^{ - 1} ( \frac{ - 18 }{ 5 \sqrt{13} } )$ =3.09° $\large\mathcal\red{hope\: this \: helps \:you......}$

7.

Find the angle between the vectors : vector a =3i - 4j and vector b = -2i+3k

Answer»

$\:\:\:\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \huge\mathcal{\bf{{\underline{\underline{\huge\mathcal{...Answer...}}}}}}$

$\underline{\large\mathcal\red{solution}}$

a =3i - 4j and vector B = -2i+3k

now ...|a|=√[(3)²+(-4)²]=5

and.....|b|=√[(-2)²+(3)²]=√13

now the DOT PRODUCT of a and b is

a.b=-6-12=-18

the angle is

$\cos {}^{ - 1} ( \frac{ - 18 }{ 5 \sqrt{13} } )$

=3.09°

$\large\mathcal\red{hope\: this \: helps \:you......}$

Discussion

8.	What is photosynthesis????????
Answer» Heya MATE.... Preparation of food by sunlight chlorophyll and CARBON dioxide is known as PHOTOSYNTHESIS... HOPE it helps uh ❤️

8.

What is photosynthesis????????

Answer»

Heya MATE....

Preparation of food by sunlight chlorophyll and CARBON dioxide is known as PHOTOSYNTHESIS...

HOPE it helps uh ❤️

Discussion

9.	A massless spool of inner radius r, outer radius R is placed against vertical wall and tilted split floor as shown. A light inextensible thread is tightly wound around the spool through which a mass m is hanging. There exists no friction at point A, while the coefficient of friction between spool and point B is μ. The angle between two surfaces is θ what ?
Answer» for SHOWING FULL ANSWER CLICK on PHOTO .

Discussion

10.	A solid cylinder of mass 'm' rolls without slippling down an inclined plane making an angle θ with the horizontal. The frictional force between the cylinder and the incline is what ?
Answer» ♋♋YOUR ANSWERS♍♍ ✍ $fk = \frac{mg \sin( \alpha ) }{3}$ consider α = θ ════════════════════ EXPLANATION — Consider α = θ We KNOW from NLM That in CASE of linear acceleration in rolling, Force can be written as $mg \sin( \alpha ) - fk = ma$ --------(1) Here, ↪ fk is kinetic friction ↪α is angle of inclination with horizontal Since this frictional force is also responsible for rotation so we can balance the torque τ = I @ [Here @ is ANGULAR acceleration ] ⇒rfk = I @ ⇒@ = (rfk) /I ⇒a / r = (rfk) /I ⇒fk = aI/r² Using equation (1) $mg \sin( \alpha ) - \frac{aI}{ {r}^{2} } = ma \\ \\ moment \: of \: inertia \: of \\ cylinder\: (I) = \frac{1}{2} m {r}^{2}$ $putting \: above \: we \: will \: get \: this \\ a = \frac{2}{3} g \sin( \alpha )$ Now this value again PUT in eqn (1) $mg \sin( \alpha ) - fk = m( \frac{2}{3} g \sin( \alpha ) )$ On solving $fk = \frac{mg \sin( \alpha ) }{3}$ HENCE, the frictional force between the cylinders and the incline is (mgsinα) /3 ╒══════════════════════╕ ♌ ‌ ‌‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ Thanks‌ ,hope you like it !!‌ ‌ ‌‌ ‌♌ ╘══════════════════════╛

10.

A solid cylinder of mass 'm' rolls without slippling down an inclined plane making an angle θ with the horizontal. The frictional force between the cylinder and the incline is what ?

Answer»

♋♋YOUR ANSWERS♍♍

✍ $fk = \frac{mg \sin( \alpha ) }{3}$

consider α = θ

════════════════════

EXPLANATION —

Consider α = θ

We KNOW from NLM

That in CASE of linear acceleration in rolling, Force can be written as

$mg \sin( \alpha ) - fk = ma$

--------(1)

Here,

↪ fk is kinetic friction

↪α is angle of inclination with horizontal

Since this frictional force is also responsible for rotation so we can balance the torque

τ = I @ [Here @ is ANGULAR acceleration ]

⇒r*fk = I @

⇒@ = (r*fk) /I

⇒a / r = (r*fk) /I

⇒fk = a*I/r²

Using equation (1)

$mg \sin( \alpha ) - \frac{aI}{ {r}^{2} } = ma \\ \\ moment \: of \: inertia \: of \\ cylinder\: (I) = \frac{1}{2} m {r}^{2}$

$putting \: above \: we \: will \: get \: this \\ a = \frac{2}{3} g \sin( \alpha )$

Now this value again PUT in eqn (1)

$mg \sin( \alpha ) - fk = m( \frac{2}{3} g \sin( \alpha ) )$

On solving

$fk = \frac{mg \sin( \alpha ) }{3}$

HENCE, the frictional force between the cylinders and the incline is (mgsinα) /3

╒══════════════════════╕

♌ ‌ ‌‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ Thanks‌ ,hope you like it !!‌ ‌ ‌‌ ‌♌

╘══════════════════════╛

Discussion

11.	a proton and an alpha particle, accelerated through same potential difference, enter in a region of uniform magnetic field with their velocities perpendicular to the field. compare the radii of circular paths followed by them.
Answer» Answer: RADIUS of the PROTON is equal radius of the alpha particle. EXPLANATION: An alpha particle is a helium nucleus = 2 PROTONS + 2 neutrons. → double mass and double positive charge of a proton. ( → is GENERATED by ALT + 26 )

11.

a proton and an alpha particle, accelerated through same potential difference, enter in a region of uniform magnetic field with their velocities perpendicular to the field. compare the radii of circular paths followed by them.

Answer»

Answer:

RADIUS of the PROTON is equal radius of the alpha particle.

EXPLANATION:

An alpha particle is a helium nucleus = 2 PROTONS + 2 neutrons.

→ double mass and double positive charge of a proton.

( → is GENERATED by ALT + 26 )

Discussion

12.	Why other metalloids are not used as semiconductors?
Answer» Metalloids are used as semi CONDUCTOR because they are neither metals nor NON metals. They have the PROPERTIES of both metals and non metals. Metalloids are semiconductors because they are neither good nor poor conductors.Metalloids have the properties of both metals and nonmetals. ... So they ACT as semiconductor.

Discussion

13.	Why reverse flow arises in turbulent flow in fluent?
Answer» Answer: Turbulent flow or we can better termed as wastage of energy since the turbulent flow seems like look at the attachment pl. The NET flow is towards ahead but the CONCENTRIC rings formed in between results in flow of some AMOUNT of water backwards hence the energy get cancelled and we get minimum energy as compared to LAMINAR and streamline flow. Explanation: The RED arrow shows movement / direction of flow Yellow arrow represents the reverse or the negative flow of water. I hope you understood it Still there is any confusion feel free to contact. Mark it Brainly if it was helpful.

13.

Why reverse flow arises in turbulent flow in fluent?

Answer»

Answer:

Turbulent flow or we can better termed as wastage of energy since the turbulent flow seems like look at the attachment pl.

The NET flow is towards ahead but the CONCENTRIC rings formed in between results in flow of some AMOUNT of water backwards

hence the energy get cancelled and we get minimum energy as compared to LAMINAR and streamline flow.

Explanation:

The RED arrow shows movement / direction of flow

Yellow arrow represents the reverse or the negative flow of water.

I hope you understood it

Still there is any confusion feel free to contact.

Mark it Brainly if it was helpful.

Discussion

14.	Why energy is lost as heat while charging a capacitor?
Answer» Answer: The PROBLEM of the "energy stored on a capacitor" is a CLASSIC ONE because it has some counterintuitive elements. To be sure, the battery puts out energy QVb in the process of charging the capacitor to equilibrium at battery voltage Vb. ... The counter-intuitive PART starts when you say "That's too much loss to tolerate. ❤Follow me ❤

14.

Why energy is lost as heat while charging a capacitor?

Answer»

Answer:

The PROBLEM of the "energy stored on a capacitor" is a CLASSIC ONE because it has some counterintuitive elements. To be sure, the battery puts out energy QVb in the process of charging the capacitor to equilibrium at battery voltage Vb. ... The counter-intuitive PART starts when you say "That's too much loss to tolerate.

❤Follow me ❤

Discussion

15.	from top of building a ball is dropped while another is projected horizontally at the same time a. which which ball will be strike the ground first b. which ball strike the ground with more speed
Answer» ANSWER: Specify the full question plz... If both the balls are dropped fram the same building and if the second BALL is making angle 0 with horizontal then both the balls will strike the groung at the same time...... If the above situation are followed the their velocities will ALSO be EQUAL because same downward acceleration - g Hope it would help

15.

from top of building a ball is dropped while another is projected horizontally at the same time a. which which ball will be strike the ground first b. which ball strike the ground with more speed

Answer»

ANSWER:

Specify the full question plz...

If both the balls are dropped fram the same building and if the second BALL is making angle 0 with horizontal then both the balls will strike the groung at the same time...... If the above situation are followed the their velocities will ALSO be EQUAL because same downward acceleration - g

Hope it would help

Discussion

16.	Thanks for solving this question
Answer» ANSWER: A=√4+36+1=√41 B=√16+4-121=√51

16.

Thanks for solving this question

Answer»

ANSWER:

A=√4+36+1=√41

B=√16+4-121=√51

Discussion

17.	Hey!♥>>What is drift velocity?
Answer» The drift velocity is the AVERAGE velocity that a PARTICLE, such as an ELECTRON, attains in a material due to an electric field. It can also be REFERRED to as AXIAL drift velocity.

Discussion

18.	Why not f=m^2×a in newton second law of motion ?
Answer» ANSWER: because.... answer in ATTACHMENT... HOPE it HELPS you

18.

Why not f=m^2×a in newton second law of motion ?

Answer»

ANSWER:

because.... answer in ATTACHMENT...

HOPE it HELPS you

Discussion

19.	The force of an electric field on 5 charge is 10 N the intensity of field is
Answer» USE FORMULA E=F/Q, GIVEN Q= 5C, F = 10N E= 10/5 = 2Nm..

19.

The force of an electric field on 5 charge is 10 N the intensity of field is

Answer»

USE FORMULA E=F/Q,

GIVEN Q= 5C, F = 10N

E= 10/5 = 2Nm..

Discussion

20.	77.A pebble is thrown vertically upwards from abridge with an initial velocity of 4.9 m/s. Itstrikes the water after 2 s. The height of thebridge is:(1) 19.6m(2) 14.7m(3) 9.8m(4) 4.9m
Answer» Answer: 9.8 is the HEIGHT of the BRIDGE Explanation: 4.9×2=9.8 TQ GN FRIEND's

20.

77.A pebble is thrown vertically upwards from abridge with an initial velocity of 4.9 m/s. Itstrikes the water after 2 s. The height of thebridge is:(1) 19.6m(2) 14.7m(3) 9.8m(4) 4.9m

Answer»

Answer:

9.8 is the HEIGHT of the BRIDGE

Explanation:

4.9×2=9.8

TQ GN FRIEND's

Discussion

21.	Initially the spring is relaxed. If the mass m isslowly released, then the elongation produced inthe spring in equilibriumSpring constant = k(1) mg/k(2) 2mg/k(3) mg/2k(4) mg/4k
Answer» ANSWER: $Option(1) \: is \: the \: correct \: answer.$ EXPLANATION: $Refer \: to \: the \: attachment \: \\ \\ Hope \: it \: will \: help \: you.$

21.

Initially the spring is relaxed. If the mass m isslowly released, then the elongation produced inthe spring in equilibriumSpring constant = k(1) mg/k(2) 2mg/k(3) mg/2k(4) mg/4k

Answer»

ANSWER:

$Option(1) \: is \: the \: correct \: answer.$

EXPLANATION:

$Refer \: to \: the \: attachment \: \\ \\ Hope \: it \: will \: help \: you.$

Discussion

22.	What is the other name of electric generator
Answer» ANSWER: AC GENERATOR EXPLANATION:

22.

What is the other name of electric generator

Answer»

ANSWER:

AC GENERATOR

EXPLANATION:

Discussion

23.	What is full from of SI unit
Answer» ANSWER: SYSTEM INTERNATIONAL

23.

What is full from of SI unit

Answer»

ANSWER:

SYSTEM INTERNATIONAL

Discussion

24.	I need five exampel for newtons three laws.
Answer» example of newton THIRD LAW of motion is if we will jump on GROUND so it will be a OPPOSITE and equal reaction

Discussion

25.	Pls answer this questionit's urgent
Answer» ANSWER: answer will be the 1.75 MM

25.

Pls answer this questionit's urgent

Answer»

ANSWER:

answer will be the 1.75 MM

Discussion

26.	Give me right answer plz
Answer» ANSWER: The QUESTION is not CLEAR

26.

Give me right answer plz

Answer»

ANSWER:

The QUESTION is not CLEAR

Discussion

27.	A block of mass 1 kg is placed on a rough wedgewhich is fixed on an elevator moving upward withconstant velocity 2 m/s and mu is root 3/2.The block m is at restw.rt. wedge. Net reaction force on the block is2 m/sIM300(1) 5N(3) 7.5 N(2) 10 N(4) 12 N
Answer» ANSWER: some THING in this QUESTION is not UNDERSTAND BLE

27.

A block of mass 1 kg is placed on a rough wedgewhich is fixed on an elevator moving upward withconstant velocity 2 m/s and mu is root 3/2.The block m is at restw.rt. wedge. Net reaction force on the block is2 m/sIM300(1) 5N(3) 7.5 N(2) 10 N(4) 12 N

Answer»

ANSWER:

some THING in this QUESTION is not UNDERSTAND BLE

Discussion

28.	the value of g will become 10% of its value at the earth's surface at a height ............ above the surface of the earth.take radius of earth as 6400 km.
Answer» Not UNDERSTANDING PLZ

Discussion

29.	Plz find out the correct ans necessary
Answer» ANSWER: it will be NUMBER C. I THINK

29.

Plz find out the correct ans necessary

Answer»

ANSWER:

it will be NUMBER C. I THINK

Discussion

30.	What is quantum fluctation
Answer» Explanation: In quantum physics, a quantum fluctuation is the temporary CHANGE in the amount of energy in a point in space, as EXPLAINED in Werner HEISENBERG's UNCERTAINTY principle. This allows the creation of particle-antiparticle pairs of virtual particles

30.

What is quantum fluctation

Answer»

Explanation:

In quantum physics, a quantum fluctuation is the temporary CHANGE in the amount of energy in a point in space, as EXPLAINED in Werner HEISENBERG's UNCERTAINTY principle. This allows the creation of particle-antiparticle pairs of virtual particles

Discussion

31.	As an inclined plane is made slowly horizontal by reducing the value of angle 0 with horizontal. Thecomponent of weight parallel to the plane of a block resting on the inclined plane-(A) decreases(B) remains same(C) increases(D) increases if the plane is smooth
Answer» ANSWER: REMAIN same I THINK it will be ANS

31.

As an inclined plane is made slowly horizontal by reducing the value of angle 0 with horizontal. Thecomponent of weight parallel to the plane of a block resting on the inclined plane-(A) decreases(B) remains same(C) increases(D) increases if the plane is smooth

Answer»

ANSWER:

REMAIN same I THINK it will be ANS

Discussion

32.	The force constant of a wire is k and that of anotherwire is 2k. When both the wires are stretched throughsame distance, then the work donear17
Answer» ANSWER: W2=2W1 Explanation: MARK AS BRAINLIEST

32.

The force constant of a wire is k and that of anotherwire is 2k. When both the wires are stretched throughsame distance, then the work donear17

Answer»

ANSWER:

W2=2W1

Explanation:

MARK AS BRAINLIEST

Discussion

33.	fringe width in Young's slit experiment of wave length 7200A⁰ is 0.10mm. find fringe width when distance between source and screen is double and distance of separation is halved when wavelength is wave length is 4500A⁰?
Answer» Answer: ♐ FRINGE WIDTH ( ẞ² ) = 0.06 MM ♐ Explanation: ★ WAVE OPTICS ★ ★ GIVEN ; » Fringe Width ( ẞ¹ ) = 0.10 mm » Wavelength ( Lamda 1 ) = 7200 Å » Wavelength ( lambda 2 ) = 4500 Å ★ » Fringe Width ( ẞ² ) = ??? [ ⬜*→ EVEN DOUBLING DISTANCE BETWEEN SLITS AND SCREEN WON'T AFFECT " FRINGE WIDTH ". ←⬜ ] ________ [ BY USING FORMULA ]* ______ [ $( \frac{ \beta 1}{ \beta 2} ) \: = ( \: \frac{lambda \: 1}{lambda \: 2 \: } )$ ] ★ [ 0.10 × 10-³ / ẞ² ] = [ 7200 Å / 4500 Å ] » [ 10-⁴ / ẞ² ] = [ 7200 / 4500 ] » ẞ² × 7200 = 4500 × 10-⁴ » ẞ² = [ 4500 × 10-⁴ / 7200 ] » ẞ² = [ 0.625 × 10-⁴ ] ♒*» ẞ² = 62.5 μm / MICRO metre «* ♒ ——————— [ OR ] ——————— ⏭ *ẞ² = 0.06 mm / MILLIMETERS* ⏮ ________________________________________ ANSWER :- FRINGE WIDTH OF WAVELENGTH 4500 Å IS ; *♣ ẞ = 0.06 mm ♥* ⏩ NOTE :- FRINGE WIDTH IS ALWAYS MEASURED IN MILLIMETERS AND FRINGE WIDTH IS PROPORTIONAL TO WAVELENGTH . ⏪

33.

fringe width in Young's slit experiment of wave length 7200A⁰ is 0.10mm. find fringe width when distance between source and screen is double and distance of separation is halved when wavelength is wave length is 4500A⁰?

Answer»

Answer:

♐ FRINGE WIDTH ( ẞ² ) = 0.06 MM ♐

Explanation:

★ WAVE OPTICS ★

★ GIVEN ;

» Fringe Width ( ẞ¹ ) = 0.10 mm

» Wavelength ( Lamda 1 ) = 7200 Å

» Wavelength ( lambda 2 ) = 4500 Å

★ » Fringe Width ( ẞ² ) = ???

[ ⬜→ EVEN DOUBLING DISTANCE BETWEEN SLITS AND SCREEN WON'T AFFECT " FRINGE WIDTH ". ←⬜ ]

________ [ BY USING FORMULA ] ______

[ $( \frac{ \beta 1}{ \beta 2} ) \: = ( \: \frac{lambda \: 1}{lambda \: 2 \: } )$ ]

★ [ 0.10 × 10-³ / ẞ² ] = [ 7200 Å / 4500 Å ]

» [ 10-⁴ / ẞ² ] = [ 7200 / 4500 ]

» ẞ² × 7200 = 4500 × 10-⁴

» ẞ² = [ 4500 × 10-⁴ / 7200 ]

» ẞ² = [ 0.625 × 10-⁴ ]

♒» ẞ² = 62.5 μm / MICRO metre « ♒

——————— [ OR ] ———————

⏭ ẞ² = 0.06 mm / MILLIMETERS ⏮

________________________________________

ANSWER :- FRINGE WIDTH OF WAVELENGTH 4500 Å IS ;

♣ ẞ = 0.06 mm ♥

⏩ NOTE :- FRINGE WIDTH IS ALWAYS MEASURED IN MILLIMETERS AND FRINGE WIDTH IS PROPORTIONAL TO WAVELENGTH . ⏪

Discussion

34.	A block of mass m containing a net +ve charge is placed on a smooth horizontal table which terminal in vertical wall as shown in a figure the distance of the block from the wall is l .a horizontal e f toward right is switched on assuming elastic collision find time period
Answer» Huihihuihuihuigyjggvfgdsedgkjnhvfgcfgvhbjh

Discussion

35.	Project on sustainability with regard to the quality of water
Answer» EXPLANATION: first sustainability means USING the resource carefully without damaging the future. now a DAYS water is reducing. In the earth one percentage of water is only there.We must use the water resources LIMITEDLY and carefully

35.

Project on sustainability with regard to the quality of water

Answer»

EXPLANATION:

first sustainability means USING the resource carefully without damaging the future. now a DAYS water is reducing. In the earth one percentage of water is only there.We must use the water resources LIMITEDLY and carefully

Discussion

36.	Under what condition in mgentuted of average velocity equal to averge speed
Answer» Explanation: Average velocity would be equal to average speed when the total distance travelled equals the NET DISPLACEMENT of a particle. This happens when a particle MOVES ALONG a STRAIGHT line in a fixed direction.

36.

Under what condition in mgentuted of average velocity equal to averge speed

Answer»

Explanation:

Average velocity would be equal to average speed when the total distance travelled equals the NET DISPLACEMENT of a particle. This happens when a particle MOVES ALONG a STRAIGHT line in a fixed direction.

Discussion

37.	The v-t graph of a linear motion is shown inadjoining figure. The distance from origin after8 seconds is -V(m/sec)567&1234t(sec)-21(1) 18 meters(3) 8 meters(2) 16 meters(4) 6 meters
Answer» ANSWER: this GRAPH is not sufficent what are the UNITS that you're have TAKEN in y AXIS???

37.

The v-t graph of a linear motion is shown inadjoining figure. The distance from origin after8 seconds is -V(m/sec)567&1234t(sec)-21(1) 18 meters(3) 8 meters(2) 16 meters(4) 6 meters

Answer»

ANSWER:

this GRAPH is not sufficent what are the UNITS that you're have TAKEN in y AXIS???

Discussion

38.	What is the law of parallelogram of forces ?
Answer» Explanation: The STATEMENT of Parallelogram law of vector addition is, If TWO vectors are considered to be the adjacent sides of a parallelogram, then the resultant of two vectors is given by the vector that is a DIAGONAL passing through the POINT of contact of two vectors.

38.

What is the law of parallelogram of forces ?

Answer»

Explanation:

The STATEMENT of Parallelogram law of vector addition is, If TWO vectors are considered to be the adjacent sides of a parallelogram, then the resultant of two vectors is given by the vector that is a DIAGONAL passing through the POINT of contact of two vectors.

Discussion

39.	What are the uses of nylon rayon and acrylic explain in Telugu.
Answer» ANSWER: I DONT KNOW telugu Explanation: SRRY

39.

What are the uses of nylon rayon and acrylic explain in Telugu.

Answer»

ANSWER:

I DONT KNOW telugu

Explanation:

SRRY

Discussion

40.	A ray is traveling in a glass cube placed in water. Find the critical angle for the glass_water interface (REFRACTIVE INDEX OF GLASS AND WATER ARE 1.5 AND1.33 REFRACTIVELY
Answer» ANSWER: n2/n1=1/sinc n2=1.5=3/2 n1=1.33=8/6 sinc= sinc 1.5/1.33=1/sinc sinC=1.33/1.5 =8/6/3/2 =8/6*2/3 =8/9 C=sin-1(8/9)

40.

A ray is traveling in a glass cube placed in water. Find the critical angle for the glass_water interface (REFRACTIVE INDEX OF GLASS AND WATER ARE 1.5 AND1.33 REFRACTIVELY

Answer»

ANSWER:

n2/n1=1/sinc

n2=1.5=3/2

n1=1.33=8/6

sinc= sinc

1.5/1.33=1/sinc

sinC=1.33/1.5

=8/6/3/2

=8/6*2/3

=8/9

C=sin-1(8/9)

Discussion

41.	From cm,kg,centigrade,volt which is not fundamental unit
Answer» ANSWER: VOLT is not a FUNDAMENTAL UNIT

41.

From cm,kg,centigrade,volt which is not fundamental unit

Answer»

ANSWER:

VOLT is not a FUNDAMENTAL UNIT

Discussion

42.	" Mass is a measure of inertia" explain
Answer» By definition, inertia is the resistance to a change in the STATE of motion of a physical object. ... Mass, which appears in Newton's SECOND law, tells you the force needed to change the velocity of an object by a given amount. Mass is THEREFORE a measure of inertia. Mark as BRAINLIEST

Discussion

43.	two vectors of equal magnitude 5 unit have an angle 60 between them. find the magnitude of a the sum of the vectors and b the difference of the vector
Answer» Answer: a Explanation: SUM of two VECTOR is root 75 unit and the DIFFERENCE is 5 unit

43.

two vectors of equal magnitude 5 unit have an angle 60 between them. find the magnitude of a the sum of the vectors and b the difference of the vector

Answer»

Answer:

a

Explanation:

SUM of two VECTOR is root 75 unit and the DIFFERENCE is 5 unit

Discussion

44.	A ball moving horizontally due north at 10 meter per second strikes a vertical wall and is reflected back moving at the same speed. What is the change in its velocity?
Answer» ANSWER: CHANGE in VELOCITY is 20m/sec.....

44.

A ball moving horizontally due north at 10 meter per second strikes a vertical wall and is reflected back moving at the same speed. What is the change in its velocity?

Answer»

ANSWER:

CHANGE in VELOCITY is 20m/sec.....

Discussion

45.	If the maximum circumference of a sphere is 2 m.then its capacitance in water would be :-(Dielectric constant of water = 81)(1) 27.65 pF(2) 2385 pF(3) 236.5 PF(4) 2865 pF
Answer» Answer: 2865pF Explanation:FIRST find radius by putting value of circumfrence .Then put value of r,dielectric CONSTANT of water and K in capacitance formula.

45.

If the maximum circumference of a sphere is 2 m.then its capacitance in water would be :-(Dielectric constant of water = 81)(1) 27.65 pF(2) 2385 pF(3) 236.5 PF(4) 2865 pF

Answer»

Answer:

2865pF

Explanation:FIRST find radius by putting value of circumfrence .Then put value of r,dielectric CONSTANT of water and K in capacitance formula.

Discussion

46.	find the gravitational force between the sun and the earth. given mass of the sun=1.99×1030kg,mass of the earth=5.98×1024kg,The average distance between the earth and the sun=1.5×10*11m
Answer» Answer: By Newton's law of gravitation F= G m1×m2 ÷ d2 F= 6.67 × 10-11 × (1.99×5.98)×1054 ÷ (1.5× 1011)2 F= 79.374334× 10-43 ÷ 2.25 × 1022 F = 35.2774817778 ×1021 F= 35.277 × 1021 N (newton) F= 3.5277 × 1022 N( newton) HOPE THIS HELPS YOU PLS mark as brainlest

46.

find the gravitational force between the sun and the earth. given mass of the sun=1.99×1030kg,mass of the earth=5.98×1024kg,The average distance between the earth and the sun=1.5×10*11m

Answer»

Answer:

By Newton's law of gravitation

F= G m1×m2 ÷ d*2

F= 6.67 × 10*-11 × (1.99×5.98)×10*54 ÷ (1.5× 10*11)*2

F= 79.374334× 10*-43 ÷ 2.25 × 10*22

F = 35.2774817778 ×10*21

F= 35.277 × 10*21 N (newton)

F= 3.5277 × 10*22 N( newton)

HOPE THIS HELPS YOU

PLS mark as brainlest

Discussion

47.	Making of bricks is chemical or physical change
Answer» Answer: chemical change Explanation: The process of manufacturing of bricks from CLAY involves preparation of clay, molding and then drying and burning of bricks. The bricks are BUILDING materials which are generally available as rectangular blocks. The bricks do not require any dressing and brick laying is very SIMPLE COMPARED to STONE masonry

47.

Making of bricks is chemical or physical change

Answer»

Answer:

chemical change

Explanation:

The process of manufacturing of bricks from CLAY involves preparation of clay, molding and then drying and burning of bricks. The bricks are BUILDING materials which are generally available as rectangular blocks. The bricks do not require any dressing and brick laying is very SIMPLE COMPARED to STONE masonry

Discussion

48.	The physical quantity denoted by mass×pressure/density is_
Answer» ANSWER: energy Explanation: masspressure/density =masspressureVOLUME/mass =pressurevolume =(newton/m²)m³ =newtonmeter =joule joule is the UNIT of energy. so the GIVEN Quantity represents energy.

48.

The physical quantity denoted by mass×pressure/density is_

Answer»

ANSWER:

energy

Explanation:

mass*pressure/density

=mass*pressure*VOLUME/mass

=pressure*volume

=(newton/m²)*m³

=newton*meter

=joule

joule is the UNIT of energy.

so the GIVEN Quantity represents energy.

Discussion

49.	Please tell how to solve ques 8
Answer» S=vt+1/2gt^2 SINCE v=u. and v'=u^2+2aS

49.

Please tell how to solve ques 8

Answer»

S=vt+1/2gt^2 SINCE v=u.

and v'=u^2+2aS

Discussion

50.	[Ans : -15]vi) In a workshop a worker measures the lengthof a steel plate with a Vernier callipershaving a least count 0.01 cm. Four suchmeasurements of the length yielded thefollowing values: 3.11 cm, 3.13 cm, 3.14cm, 3.14 cm. Find the mean length, themean absolute error and the percentageerror in the measured value of thelength.[Ans: 3.13 cm,
Answer» Given: a1=3.11; a2=3.13; A3=3.14; A4=3.14 Mean LENGTH (am) = a1+a2+q3+a4/4 =3.11+3.13+3.14+3.14/4 = 12.52/4 (am) = 3.13cm. ABSOLUTE error: ∆a1=\|am - a1 \| = \| 3.13-3.11 \| = 0.02 ∆a2=\|am -a2 \| = \| 3.13-3.13 \| =0 ∆a3=\|am -a3 \| = \| 3.13-3.14 \| =0.01 ∆a4=\|am -a4 \| = \| 3.13-3.14 \| =0.01 Mean absolute error: ∆am=∆a1+∆a2+∆a3+∆a4/4 ∆am=0.02+0+0.01+0.01/4 ∆am=0.01cm % error = ∆am/am =0.01/3.13*100 =0.31%

50.

[Ans : -15]vi) In a workshop a worker measures the lengthof a steel plate with a Vernier callipershaving a least count 0.01 cm. Four suchmeasurements of the length yielded thefollowing values: 3.11 cm, 3.13 cm, 3.14cm, 3.14 cm. Find the mean length, themean absolute error and the percentageerror in the measured value of thelength.[Ans: 3.13 cm,

Answer»

Given:

a1=3.11; a2=3.13; A3=3.14; A4=3.14

Mean LENGTH (am) = a1+a2+q3+a4/4

=3.11+3.13+3.14+3.14/4

= 12.52/4

(am) = 3.13cm.

ABSOLUTE error:

∆a1=|am - a1 | = | 3.13-3.11 | = 0.02

∆a2=|am -a2 | = | 3.13-3.13 | =0

∆a3=|am -a3 | = | 3.13-3.14 | =0.01

∆a4=|am -a4 | = | 3.13-3.14 | =0.01

Mean absolute error:

∆am=∆a1+∆a2+∆a3+∆a4/4

∆am=0.02+0+0.01+0.01/4

∆am=0.01cm

% error = ∆am/am

=0.01/3.13*100

=0.31%

Discussion

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