67486 + Interview Questions in Secondary School in Physics

1.	On what factors evaporation will depend
Answer» ANSWER: sruface area . ROOM tamperature humidity Explanation: if the SURFACE area is more EVAPORATION is more . room temparature more evaporation more. humidity is more evaporation is LESS

1.

On what factors evaporation will depend

Answer»

ANSWER:

sruface area .

ROOM tamperature

humidity

Explanation:

if the SURFACE area is more EVAPORATION is more .

room temparature more evaporation more.

humidity is more evaporation is LESS

Discussion

2.	A motor car with a mass of 1200kg moves from raced with uniform from acceleration and attend a maximum speed is 8m/s what is kinetic energy
Answer» Answer: the answer is 38400 J . pls thank my answer and mark as brainliest. Explanation: m = 1200 kg v = 8 m/s kinetic ENERGY = 1/2 * m * v^2 = 1/2 * 1200 * 8^2 = 1/2 * 1200 * 64 = 1/2 * 600 * 64 = 38400 J

2.

A motor car with a mass of 1200kg moves from raced with uniform from acceleration and attend a maximum speed is 8m/s what is kinetic energy

Answer»

Answer:

the answer is 38400 J .

pls thank my answer and mark as brainliest.

Explanation:

m = 1200 kg

v = 8 m/s

kinetic ENERGY = 1/2 * m * v^2

= 1/2 * 1200 * 8^2

= 1/2 * 1200 * 64

= 1/2 * 600 * 64

= 38400 J

Discussion

3.	If least count of an instrument is taken as absoluteerror then the relative error in the measurement oflength 32.4 cm by a metre scale is
Answer» Answer: 4.7cm is the CORRECT answer hope you UNDERSTAND

3.

If least count of an instrument is taken as absoluteerror then the relative error in the measurement oflength 32.4 cm by a metre scale is

Answer»

Answer:

4.7cm is the CORRECT answer

hope you UNDERSTAND

Discussion

4.	Windings in meaning
Answer» ANSWER: . a TWISTING MOVEMENT or COURSE.

4.

Windings in meaning

Answer»

ANSWER:

.

a TWISTING MOVEMENT or COURSE.

Discussion

5.	You are at a party and one of the guests performs a demonstration in which he pulls the tablecloth out from under a glass of water on a small table. The glass remains on the table and the water is not spilled. Explain how the glass remains on the table using Newton’s first law of motion
Answer» Newton's first law says that, Tableware will remain motionless UNLESS acted UPON an extenal force. While the table cloth is PULLED slowly, the tableware try match its ACCELERATION and moves. But, when table cloth is pulled rapidly tableware remains at the state of rest.

5.

You are at a party and one of the guests performs a demonstration in which he pulls the tablecloth out from under a glass of water on a small table. The glass remains on the table and the water is not spilled. Explain how the glass remains on the table using Newton’s first law of motion

Answer»

Newton's first law says that,

Tableware will remain motionless UNLESS acted UPON an extenal force.

While the table cloth is PULLED slowly, the tableware try match its ACCELERATION and moves.

But, when table cloth is pulled rapidly tableware remains at the state of rest.

Discussion

6.	Harmfull dust in meaning
Answer» Answer: AIRBORNE dusts are of particular concern because they are well KNOWN to be associated with classical widespread OCCUPATIONAL lung diseases such as the pneumoconioses, as well as with systemic intoxications such as lead poisoning, ESPECIALLY at higher levels of exposure. Mark as BRAINLIST❤️

6.

Harmfull dust in meaning

Answer»

Answer:

AIRBORNE dusts are of particular concern because they are well KNOWN to be associated with classical widespread OCCUPATIONAL lung diseases such as the pneumoconioses, as well as with systemic intoxications such as lead poisoning, ESPECIALLY at higher levels of exposure.

Mark as BRAINLIST❤️

Discussion

7.	Refractive index of glass is 1.5the find its critical angle.
Answer» ANSWER: SIN^-1 2/3 Explanation: sin IC 1/n = 1/1−5 i = sin^-1 1/1−5 = sin^-1 10/15 = sin^-1 2/3

7.

Refractive index of glass is 1.5the find its critical angle.

Answer»

ANSWER:

SIN^-1 2/3

Explanation:

sin IC 1/n = 1/1−5

i = sin^-1 1/1−5

= sin^-1 10/15

= sin^-1 2/3

Discussion

8.	Represent 36k/m in m/s
Answer» Answer: 36000m/60s 600m/s Hope it HELPS you.

8.

Represent 36k/m in m/s

Answer»

Answer:

36000m/60s

600m/s

Hope it HELPS you.

Discussion

9.	Enclosure's in kannada meaning
Answer» ANSWER: the MEANING is EXPLANATION: ಆವರಣಗಳು

9.

Enclosure's in kannada meaning

Answer»

ANSWER:

the MEANING is

EXPLANATION:

ಆವರಣಗಳು

Discussion

10.	A rocket travels at a speed of 15000 m/s . Express into k/m
Answer» EXPLANATION: ALOHA ! 1km=1000m 1.5 m/s Thank you @ Twilight ASTRO ✌️☺️

10.

A rocket travels at a speed of 15000 m/s . Express into k/m

Answer»

EXPLANATION:

ALOHA !

1km=1000m

1.5 m/s

Thank you

@ Twilight ASTRO ✌️☺️

Discussion

11.	Newton law is universal is it true
Answer» ANSWER: YES it is TRUE HOPE it will HELP you

11.

Newton law is universal is it true

Answer»

ANSWER:

YES it is TRUE

HOPE it will HELP you

Discussion

12.	22. a) What is the hybridized state of the central atom in the following -NO3-IFs
Answer» ANSWER: SINCE it's a symmetric atom with three substituents, the GEOMETRY around the central atom will be trigonal planar, and the hybridization will be SP2. Each of nitrogen's three sp2 orbitals overlaps with the s orbital of one of the oxygen atoms. Explanation: Please make me a BRAINLIST answer and like and follow please

12.

22. a) What is the hybridized state of the central atom in the following -NO3-IFs

Answer»

ANSWER:

SINCE it's a symmetric atom with three substituents, the GEOMETRY around the central atom will be trigonal planar, and the hybridization will be SP2. Each of nitrogen's three sp2 orbitals overlaps with the s orbital of one of the oxygen atoms.

Explanation:

Please make me a BRAINLIST answer and like and follow please

Discussion

13.	30. A monochromatic ray of light strikes the surface of transparent medium at an angleof incidence 60° and gets refracted into the medium at an angle of refraction 45º.What is the refractive index of the medium ?
Answer» Answer: Mark it As BRAINLEST Explanation: By SNELL's law $\frac{sini}{sinr}$ THEREFORE $\frac{sin60}{sin45}$ Solving it we get, -0.3582199 it is the answer.

13.

30. A monochromatic ray of light strikes the surface of transparent medium at an angleof incidence 60° and gets refracted into the medium at an angle of refraction 45º.What is the refractive index of the medium ?

Answer»

Answer:

Mark it As BRAINLEST

Explanation:

By SNELL's law

$\frac{sini}{sinr}$

THEREFORE

$\frac{sin60}{sin45}$

Solving it we get,

-0.3582199 it is the answer.

Discussion

14.	Can I do aerospace engineering after taking biomaths in+1?
Answer» Answer: yes ofcourse you can . you MUST have MATHS as your MAIN subject and bio as OPTIONAL.

14.

Can I do aerospace engineering after taking biomaths in+1?

Answer»

Answer:

yes ofcourse you can .

you MUST have MATHS as your MAIN subject and bio as OPTIONAL.

Discussion

15.	A ball is projected with a velocity v making an angle theta with horizontal the position co ordinates of a point on its trajectory are given by ... x=3t .... y= 4t-5tsqaure...What is velocity of projection
Answer» Answer: Theta should be given!! But similar question answer is here . MARK as BRAINLEST Explanation: PHYSICS A particle is projected with a VELOCITY v, so that its range on a horizontal plane is TWICE the greatest height attained. If g is acceleration due to GRAVITY, then its range is: December 27, 2019avatar Manika Bhattacharyya SHARE ANSWER Range should be twice the greatest height R=2H g v 2 sin2θ =2 2g v 2 sin 2 θ ⟹sin2θ=sin 2 θ 2sinθcosθ=sin 2 θ ∴tanθ=2 sinθ= 5 2 therefore range is R= g v 2 sin2θ = g 2v 2 sinθcosθ = g 2v 2 × 5 2 × 5 1 = 5g 4v 2

15.

A ball is projected with a velocity v making an angle theta with horizontal the position co ordinates of a point on its trajectory are given by ... x=3t .... y= 4t-5tsqaure...What is velocity of projection

Answer»

Answer:

Theta should be given!! But similar question answer is here . MARK as BRAINLEST

Explanation:

PHYSICS

A particle is projected with a VELOCITY v, so that its range on a horizontal plane is TWICE the greatest height attained. If g is acceleration due to GRAVITY, then its range is:

December 27, 2019avatar

Manika Bhattacharyya

SHARE

ANSWER

Range should be twice the greatest height

R=2H

g

v

2

sin2θ

=2

2g

v

2

sin

2

θ

⟹sin2θ=sin

2

θ

2sinθcosθ=sin

2

θ

∴tanθ=2

sinθ=

5

2

therefore range is R=

g

v

2

sin2θ

=

g

2v

2

sinθcosθ

=

g

2v

2

×

5

2

×

5

1

=

5g

4v

2

Discussion

16.	What is angular momentum in oscillating body?
Answer» Answer: When a body is allowed to rotate FREELY about a given axis then the oscillation is known as the angular oscillation. The POINT at which the resultant torque acting on the body is taken to be zero is called mean position Explanation: PLEASE MAKE me a brainlist answer and like and follow please

16.

What is angular momentum in oscillating body?

Answer»

Answer:

When a body is allowed to rotate FREELY about a given axis then the oscillation is known as the angular oscillation. The POINT at which the resultant torque acting on the body is taken to be zero is called mean position

Explanation:

PLEASE MAKE me a brainlist answer and like and follow please

Discussion

17.	What happens if the forces are applied on an object in the same direction????????????????? ¿?? ¿¿¿¿¿¿
Answer» ANSWER: it RESULTS in ACCELERATION of BODY in that DIRECTION

17.

What happens if the forces are applied on an object in the same direction????????????????? ¿?? ¿¿¿¿¿¿

Answer»

ANSWER:

it RESULTS in ACCELERATION of BODY in that DIRECTION

Discussion

18.	how do you appreciate the role of higher specific heat of water in stabilizing atmospheric temperature during winter and summer seasons
Answer» Answer: the hot water in summer SEASON BRINGS summer RAINS and in winter moists the atmosphere to COOL it down please mark as brainliest bro

18.

how do you appreciate the role of higher specific heat of water in stabilizing atmospheric temperature during winter and summer seasons

Answer»

Answer:

the hot water in summer SEASON BRINGS summer RAINS and in winter moists the atmosphere to COOL it down

please mark as brainliest bro

Discussion

19.	Difference between valiency and ion
Answer» Answer: Charge is always related to atoms whereas VALENCY is related to elements and is similar to the number of ion(negative or positive) present on the ELEMENT. VALENCY IS A COMBINING CAPACITY OF AN ELEMENT. Explanation: PLZ mark as brainliest FIRST and follow me

19.

Difference between valiency and ion

Answer»

Answer:

Charge is always related to atoms whereas VALENCY is related to elements and is similar to the number of ion(negative or positive) present on the ELEMENT. VALENCY IS A COMBINING CAPACITY OF AN ELEMENT.

Explanation:

PLZ mark as brainliest FIRST and follow me

Discussion

20.	how do you appreciate the role of the highest specific heat of water in stabilizing atmospheric temperature during winter and summer season
Answer» Answer: High specific heat means the substance takes a lot of heat to raise its temperature by 1⁰C. ALSO, water gives out a lot of heat when it cools by 1⁰C. During winter water from oceans and rivers collects heat during the DAY and gives out during the NIGHT. The atmosphere gets warmed up in the night. It helps people from cold. During summer because water takes a lot of time to heat up, water remains relatively cool compared to the atmosphere. That is why people swim a lot in pools and in rivers. Water evaporates taking a lot of heat and goes up into clouds. That evaporation KEEPS the water on surface and atmosphere cool. Breezes from the rivers, oceans blow towards the land due to the pressure difference (created by hotter temperature of air & lighter density) Explanation: best answer mark brainlist plz follow kardena yar press thanks button below if u satisfied

20.

how do you appreciate the role of the highest specific heat of water in stabilizing atmospheric temperature during winter and summer season

Answer»

Answer:

High specific heat means the substance takes a lot of heat to raise its temperature by 1⁰C. ALSO, water gives out a lot of heat when it cools by 1⁰C.

During winter water from oceans and rivers collects heat during the DAY and gives out during the NIGHT. The atmosphere gets warmed up in the night. It helps people from cold.

During summer because water takes a lot of time to heat up, water remains relatively cool compared to the atmosphere. That is why people swim a lot in pools and in rivers.

Water evaporates taking a lot of heat and goes up into clouds. That evaporation KEEPS the water on surface and atmosphere cool. Breezes from the rivers, oceans blow towards the land due to the pressure difference (created by hotter temperature of air & lighter density)

Explanation:

best answer

mark brainlist plz

follow kardena yar

press thanks button below if u satisfied

Discussion

21.	suggest an experiment to prove that the rate of evaporation of a liquid depends on its surface area and vapour and vapour present in surrounding area
Answer» Aim to SHOW evaporation depends on surface Aparatus LID,plate,water procedure place water on a cap and INA lid kerp it like that for some time then observe and check the water level then u will find thevwater in the cap LESS than the water in the lid make SURE that u pour equal amount of water conclusion this shows that evaporation depends on surface

21.

suggest an experiment to prove that the rate of evaporation of a liquid depends on its surface area and vapour and vapour present in surrounding area

Answer»

Aim

to SHOW evaporation depends on surface

Aparatus

LID,plate,water

procedure

place water on a cap and INA lid kerp it like that for some time then observe and check the water level then u will find thevwater in the cap LESS than the water in the lid make SURE that u pour equal amount of water

conclusion

this shows that evaporation depends on surface

Discussion

22.	Can a spring constant be negative ?
Answer» EXPLANATION: The SPRING CONSTANT cannot be NEGATIVE but the spring FORCE is negative

22.

Can a spring constant be negative ?

Answer»

EXPLANATION:

The SPRING CONSTANT cannot be NEGATIVE but the spring FORCE is negative

Discussion

23.	.7) Do not work in a place where your head is nearer to the live wire. in Kannada meaning
Answer» Answer: ninu kelsa maduvaga CURRENT ATHIRA HOGA BEDA

23.

.7) Do not work in a place where your head is nearer to the live wire. in Kannada meaning

Answer»

Answer:

ninu kelsa maduvaga CURRENT ATHIRA HOGA BEDA

Discussion

24.	Two point charges + 2 microcoulomb and + 6 microcoulomb are located at points A and B respectively then CM apart in vacuum 1.what is the electric field at a point O of the line AB2.if a positive charge 5 nC is placed at a point O .what is the force experienced by that charge
Answer» Answer: Q 1 =400μC=400×10 −6 C Q 2 =100μC=100×10 −6 C DISTANCE between two charges d=60cm Thus distance of POINT O from each charge r= 2 60 cm=30cm=30×10 −2 m Consider that point charges are kept at point A and point B. If 'O' is the midpoint, where we need to calculate the ELECTRIC field due to these charges. At point O, electric field due to point charge kept at A, E 1 = 4πϵ 0 1 × r 2 Q 1 =9×10 9 × (30×10 −2 ) 2 400×10 −6 [in the direction of AO] At point O, electric field due to point charge kept at B, E 2 = 4πϵ 0 1 r 2 Q 2 =9×10 9 × (30×10 −2 ) 2 100×10 −6 [in the direction of BO] So, resultant electric field E = E 1 − E 2 E = (30×10 −2 ) 2 9×10 9 ×10 −6 (400−100) = 900×10 −4 9×10 9 ×10 −6 ×300 =3×10 7 N/C [in the direction of AO] solution Explanation:

24.

Two point charges + 2 microcoulomb and + 6 microcoulomb are located at points A and B respectively then CM apart in vacuum 1.what is the electric field at a point O of the line AB2.if a positive charge 5 nC is placed at a point O .what is the force experienced by that charge

Answer»

Answer:

Q

1

=400μC=400×10

−6

C

Q

2

=100μC=100×10

−6

C

DISTANCE between two charges d=60cm

Thus distance of POINT O from each charge r=

2

60

cm=30cm=30×10

−2

m

Consider that point charges are kept at point A and point B. If 'O' is the midpoint, where we need to calculate the ELECTRIC field due to these charges.

At point O, electric field due to point charge kept at A,

E

1

=

4πϵ

0

1

×

r

2

Q

1

=9×10

9

×

(30×10

−2

)

2

400×10

−6

[in the direction of AO]

At point O, electric field due to point charge kept at B,

E

2

=

4πϵ

0

1

r

2

Q

2

=9×10

9

×

(30×10

−2

)

2

100×10

−6

[in the direction of BO]

So, resultant electric field

E

=

E

1

−

E

2

E

=

(30×10

−2

)

2

9×10

9

×10

−6

(400−100)

=

900×10

−4

9×10

9

×10

−6

×300

=3×10

7

N/C [in the direction of AO]

solution

Explanation:

Discussion

25.	In our solar system, the inter-planetary region has chunksof matter (much smaller in size compared to planets)called asteroids. They(a) will not move around the sun, since they have verysmall masses compared to the sun(b) will move in an irregular way because of their smallmasses and will drift away into outer space(c) will move around the sun in closed orbits but notobey Kepler's laws(d) will move in orbits like planets and obey Kepler'slaws
Answer» Answer: In our SOLAR system, the inter-planetary REGION has chunks of matter (MUCH smaller in size compared to planets) called asteroids. They. Solution : Asteroids are also being acted upon by central GRAVITATIONAL forces, hence they are moving in circular orbits LIKE planets and obey Kepler's laws. Explanation:

25.

In our solar system, the inter-planetary region has chunksof matter (much smaller in size compared to planets)called asteroids. They(a) will not move around the sun, since they have verysmall masses compared to the sun(b) will move in an irregular way because of their smallmasses and will drift away into outer space(c) will move around the sun in closed orbits but notobey Kepler's laws(d) will move in orbits like planets and obey Kepler'slaws

Answer»

Answer:

In our SOLAR system, the inter-planetary REGION has chunks of matter (MUCH smaller in size compared to planets) called asteroids. They. Solution : Asteroids are also being acted upon by central GRAVITATIONAL forces, hence they are moving in circular orbits LIKE planets and obey Kepler's laws.

Explanation:

Discussion

26.	Define the term internal energy
Answer» ANSWER: The energy in a SYSTEM arising from the RELATIVE positions and interaction of its parts is called internal energy . hope it HELPS you

26.

Define the term internal energy

Answer»

ANSWER:

The energy in a SYSTEM arising from the RELATIVE positions

and interaction of its parts is called internal energy .

hope it HELPS you

Discussion

27.	Prism with angle 60 , if the deviation angle is 16 , calculate the refractive index of the prism.A : 1.53B : 0.83C: -1.53D: 1.23
Answer» D=(n-1)A where D=deviation A=angle of prism n=refractive index of prism 》》16=(n-1)60 n-1=4/15 n=19/15 hope this helps you PLEASE mark the ANSWER as brainliest please please follow me

27.

Prism with angle 60 , if the deviation angle is 16 , calculate the refractive index of the prism.A : 1.53B : 0.83C: -1.53D: 1.23

Answer»

D=(n-1)A

where

D=deviation

A=angle of prism

n=refractive index of prism

》》16=(n-1)60

n-1=4/15

n=19/15

hope this helps you

PLEASE mark the ANSWER as brainliest please

please follow me

Discussion

28.	A 55 kg woman climbs a flight of stairs 5 m high. How much work is required?
Answer» Answer: Whatsapp: +1(805)9000710 We help people get genuine IELTS,TOEFL,PTE CERTIFICATES Explanation: Whatsapp: +1(805)9000710 PURCHASE REGISTERED IELTS PTE, OET, GMAT, GRE, TOEFL, PR, CELPIP CERTIFICATES WITH HIGH SCORES WITHOUT SITTING FOR EXAMS. WE CAN ALSO CONTROL YOUR SCORE FROM THE DATA BASE AFTER YOU HAVE TAKEN EXAMS IF YOU THINK YOU DIDN'T WRITE WELL. WE CAN ALSO HELP IN UPGRADING PREVIOUS SCORE IN YOUR SCORE CARD IF YOUR EXAM IS NOT MORE THAN 3 MONTHS. WE CAN ALSO PROVIDE LEAKED QUESTIONS AND ANSWERS PAPERS FOR EVERY EXAM DATE AND IT'S AVAILABLE DAYS BEFORE EXAMS. NOTE ::: ALL THESE ARE DONE DIRECTLY FROM THE BRITISH COUNCIL DATA BASE WITH 100% GUARANTEE. WE CAN EQUALLY HELP YOU GET IMMIGRATION DOCUMENTS. TOURIST/STUDY/WORK AND BUSINESS VISA PASSPORTS DRIVER'S LICENSE ID CARDS RESIDENT PERMITS ONLY SERIOUS PEOPLE SHOULD CONTACT US Whatsapp:+1(805)9000710

28.

A 55 kg woman climbs a flight of stairs 5 m high. How much work is required?

Answer»

Answer:

Whatsapp: +1(805)9000710

We help people get genuine IELTS,TOEFL,PTE CERTIFICATES

Explanation:

Whatsapp: +1(805)9000710

PURCHASE REGISTERED

IELTS

PTE,

OET,

GMAT,

GRE,

TOEFL,

PR, CELPIP CERTIFICATES WITH HIGH SCORES WITHOUT SITTING FOR EXAMS.

WE CAN ALSO CONTROL YOUR SCORE FROM THE DATA BASE AFTER YOU HAVE TAKEN EXAMS IF YOU THINK YOU DIDN'T WRITE WELL.

WE CAN ALSO HELP IN UPGRADING PREVIOUS SCORE IN YOUR SCORE CARD IF YOUR EXAM IS NOT MORE THAN 3 MONTHS.

WE CAN ALSO PROVIDE LEAKED QUESTIONS AND ANSWERS PAPERS FOR EVERY EXAM DATE AND IT'S AVAILABLE DAYS BEFORE EXAMS.

NOTE ::: ALL THESE ARE DONE DIRECTLY FROM THE BRITISH COUNCIL DATA BASE WITH 100% GUARANTEE.

WE CAN EQUALLY HELP YOU GET IMMIGRATION DOCUMENTS.

TOURIST/STUDY/WORK AND BUSINESS VISA

PASSPORTS

DRIVER'S LICENSE

ID CARDS

RESIDENT PERMITS

ONLY SERIOUS PEOPLE SHOULD CONTACT US

Whatsapp:+1(805)9000710

Discussion

29.	A particle is moving on hexagon of side 'a' with speed v. what will be it's avg speed and avg velocity for A to C journey
Answer» Let the time taken to travel from A to C be $\displaystyle\sf {t.}$ ASSUME the hexagon is of regular. The DISTANCE between A and C will be $\displaystyle\sf {2a.}$ Then, average speed, $\displaystyle\longrightarrow\sf{\underline {\underline {v'=\dfrac {2a}{t}}}}$ There will be a TRIANGLE ABC where $\displaystyle\sf {AB=BC=a}$ and $\displaystyle\sf {\angle ABC=120^{\circ}.}$ The displacement between A and C will be, by COSINE rule, $\displaystyle\longrightarrow\sf{AC=\sqrt{AB^2+BC^2-2\cdot AB\cdot BC\ \cos120^{\circ}}}$ $\displaystyle\longrightarrow\sf{AC=\sqrt{a^2+a^2-2a^2\cos120^{\circ}}}$ $\displaystyle\longrightarrow\sf{AC=\sqrt{2a^2(1-\cos120^{\circ})}}$ $\displaystyle\longrightarrow\sf{AC=\sqrt{2a^2\cdot2\sin^260^{\circ}}}$ $\displaystyle\longrightarrow \sf{AC=2a\sin 60^{\circ}}$ $\displaystyle\longrightarrow\sf{AC=2a\cdot\dfrac {\sqrt3}{2}}$ $\displaystyle\longrightarrow\sf{AC=a\sqrt3}$ Hence the magnitude of the average velocity is, $\displaystyle\longrightarrow\sf{\|\vec v\|=\dfrac {a\sqrt3}{t}}$ It's DIRECTION is along $\displaystyle\sf {\vec {AC}.}$ Let the direction of $\displaystyle\sf {\vec {AC}}$ be $\displaystyle\sf {\alpha.}$ Then, $\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {a\sin 60^{\circ}}{a+a\cos 60^{\circ}}\right)}$ $\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {\frac {a\sqrt3}{2}}{a+\frac {a}{2}}\right)}$ $\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {\frac {a\sqrt3}{2}}{\frac {3a}{2}}\right)}$ $\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {1}{\sqrt3}\right)}$ since $\displaystyle\sf {\alpha}$ is an acute angle, $\displaystyle\longrightarrow\sf{\alpha=30^{\circ}}$ Let $\displaystyle\sf {\vec {AB}=a\ \hat i}$ and $\displaystyle\sf {\vec {BC}=a\cos 60^{\circ}\ \hat i+a\sin 60^{\circ}\ \hat j.}$ Then the average velocity is, $\displaystyle\longrightarrow\sf{\underline {\underline {\vec v=\dfrac {a\cos 30^{\circ}\sqrt3}{t}\ \hat i+\dfrac {a\sin 30^{\circ}\sqrt3}{t}\ \hat j}}}$

29.

A particle is moving on hexagon of side 'a' with speed v. what will be it's avg speed and avg velocity for A to C journey

Answer»

Let the time taken to travel from A to C be $\displaystyle\sf {t.}$ ASSUME the hexagon is of regular.

The DISTANCE between A and C will be $\displaystyle\sf {2a.}$ Then, average speed,

$\displaystyle\longrightarrow\sf{\underline {\underline {v'=\dfrac {2a}{t}}}}$

There will be a TRIANGLE ABC where $\displaystyle\sf {AB=BC=a}$ and $\displaystyle\sf {\angle ABC=120^{\circ}.}$

The displacement between A and C will be, by COSINE rule,

$\displaystyle\longrightarrow\sf{AC=\sqrt{AB^2+BC^2-2\cdot AB\cdot BC\ \cos120^{\circ}}}$

$\displaystyle\longrightarrow\sf{AC=\sqrt{a^2+a^2-2a^2\cos120^{\circ}}}$

$\displaystyle\longrightarrow\sf{AC=\sqrt{2a^2(1-\cos120^{\circ})}}$

$\displaystyle\longrightarrow\sf{AC=\sqrt{2a^2\cdot2\sin^260^{\circ}}}$

$\displaystyle\longrightarrow \sf{AC=2a\sin 60^{\circ}}$

$\displaystyle\longrightarrow\sf{AC=2a\cdot\dfrac {\sqrt3}{2}}$

$\displaystyle\longrightarrow\sf{AC=a\sqrt3}$

Hence the magnitude of the average velocity is,

$\displaystyle\longrightarrow\sf{|\vec v|=\dfrac {a\sqrt3}{t}}$

It's DIRECTION is along $\displaystyle\sf {\vec {AC}.}$

Let the direction of $\displaystyle\sf {\vec {AC}}$ be $\displaystyle\sf {\alpha.}$ Then,

$\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {a\sin 60^{\circ}}{a+a\cos 60^{\circ}}\right)}$

$\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {\frac {a\sqrt3}{2}}{a+\frac {a}{2}}\right)}$

$\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {\frac {a\sqrt3}{2}}{\frac {3a}{2}}\right)}$

$\displaystyle\longrightarrow\sf{\alpha=\tan^{-1}\left (\dfrac {1}{\sqrt3}\right)}$

since $\displaystyle\sf {\alpha}$ is an acute angle,

$\displaystyle\longrightarrow\sf{\alpha=30^{\circ}}$

Let $\displaystyle\sf {\vec {AB}=a\ \hat i}$ and $\displaystyle\sf {\vec {BC}=a\cos 60^{\circ}\ \hat i+a\sin 60^{\circ}\ \hat j.}$

Then the average velocity is,

$\displaystyle\longrightarrow\sf{\underline {\underline {\vec v=\dfrac {a\cos 30^{\circ}\sqrt3}{t}\ \hat i+\dfrac {a\sin 30^{\circ}\sqrt3}{t}\ \hat j}}}$

Discussion

30.	What is corona.............
Answer» Answer: what is there to KNOW about Corona Explanation: it's just a viral DISEASE which LED to just a 10006 KILLS yet TODAY

30.

What is corona.............

Answer»

Answer:

what is there to KNOW about Corona

Explanation:

it's just a viral DISEASE which LED to just a 10006 KILLS yet TODAY

Discussion

31.	The polarizing angle in air for diamond is 67.4°. Calculate the critical angle e, inside the diamond for total internal reflection.
Answer» Answer: 22.8° Explanation: TAN(IP)=u Where, ip=Polarizing ANGLE u=refractive index From the above EQUATION, u=2.4 Sin(E)=1/u Where, e=critical angle From the above equation, e=22.8°

31.

The polarizing angle in air for diamond is 67.4°. Calculate the critical angle e, inside the diamond for total internal reflection.

Answer»

Answer:

22.8°

Explanation:

TAN(IP)=u

Where, ip=Polarizing ANGLE

u=refractive index

From the above EQUATION, u=2.4

Sin(E)=1/u

Where, e=critical angle

From the above equation, e=22.8°

Discussion

32.	Can comservation of momentum be used in presence of impulsive forceexplainI solved on physics question in which momentum conservation is applied in presence of impulsive force
Answer» ANSWER: I don't know if you COULD send me the most important thing in my opinion is a bit of a PROBLEM in the world and I will be in a story about a month AGO I have to be a bit more about the new job and the rest of the world and the rest of the world and is filed under a different post to the end of the people immediately after that we have to be a problem in the UK and Ireland for your email client run in CONJUNCTION to the right to the end of this email address is being protected from work at a time of year again in my opinion the spartans full time permanent Jobs in London and New year to year old son and the

32.

Can comservation of momentum be used in presence of impulsive forceexplainI solved on physics question in which momentum conservation is applied in presence of impulsive force

Answer»

ANSWER:

I don't know if you COULD send me the most important thing in my opinion is a bit of a PROBLEM in the world and I will be in a story about a month AGO I have to be a bit more about the new job and the rest of the world and the rest of the world and is filed under a different post to the end of the people immediately after that we have to be a problem in the UK and Ireland for your email client run in CONJUNCTION to the right to the end of this email address is being protected from work at a time of year again in my opinion the spartans full time permanent Jobs in London and New year to year old son and the

Discussion

33.	How Wien`s constant calculated?
Answer» Answer: Hope it HELPS you EXPLANATION: It is equal to approximately 2.898 X 10 -3 meter-kelvin (0.2898 centimeter-kelvin). The product of the thermodynamic temperature of a black body in kelvin s, and the wavelength of its peak energy output in meter s, is equal to Wien's CONSTANT.

33.

How Wien`s constant calculated?

Answer»

Answer:

Hope it HELPS you

EXPLANATION:

It is equal to approximately 2.898 X 10 -3 meter-kelvin (0.2898 centimeter-kelvin). The product of the thermodynamic temperature of a black body in kelvin s, and the wavelength of its peak energy output in meter s, is equal to Wien's CONSTANT.

Discussion

34.	The distance between any two nearest particles of the medium, vibrating in the same phase known as
Answer» ANSWER: Wavelength Explanation: FOLLOW MAH ❣️❣️

34.

The distance between any two nearest particles of the medium, vibrating in the same phase known as

Answer»

ANSWER:

Wavelength

Explanation:

FOLLOW MAH ❣️❣️

Discussion

35.	Which description of gravity oak force is false?a. it exists between all objectsb. it depends on the mass of objectsc. it depends on the distance between objectsd. it repels all object.
Answer» Answer: d is false .. GRAVITATIONAL FORCE is ALWAYS ATTRACTIVE ..

35.

Which description of gravity oak force is false?a. it exists between all objectsb. it depends on the mass of objectsc. it depends on the distance between objectsd. it repels all object.

Answer»

Answer:

d is false .. GRAVITATIONAL FORCE is ALWAYS ATTRACTIVE ..

Discussion

36.	A golf ball undergoing the projectile motion, the magnitude of the initial velocity and elevation angle are v , q.Find the curvature of the starting point 0.
Answer» ANSWER: v^2/gcos(Q) Explanation: Curvature=(VELOCITY)^2/acceleration perpendicular to the MOTION. R=v^2/gcos(q)

36.

A golf ball undergoing the projectile motion, the magnitude of the initial velocity and elevation angle are v , q.Find the curvature of the starting point 0.

Answer»

ANSWER:

v^2/gcos(Q)

Explanation:

Curvature=(VELOCITY)^2/acceleration perpendicular to the MOTION.

R=v^2/gcos(q)

Discussion

37.	Determine the speed of microwaves in polythene given that the relative permittivity of polythene at microwave frequencies is 2.3. If the rms electric field strength of a microwave beam in polythene is 1.4V m−1what is the rms magnetic field strength? Determine also the energy flux in the microwave beam in polythene.
Answer» Answer: SAMEER here ✌️✌️ ye sab Jaan or KYA karoge yrr ♥️RADHE Radhe jii♥️

37.

Determine the speed of microwaves in polythene given that the relative permittivity of polythene at microwave frequencies is 2.3. If the rms electric field strength of a microwave beam in polythene is 1.4V m−1what is the rms magnetic field strength? Determine also the energy flux in the microwave beam in polythene.

Answer»

Answer:

SAMEER here ✌️✌️

ye sab Jaan or KYA karoge yrr

♥️RADHE Radhe jii♥️

Discussion

38.	Define state motion
Answer» Hii there here is your answer The state of motion of an object is defined by its velocity - SPEED with a direction. An object at rest has zero velocity will remain with zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted UPON by an unbalanced force. Hope it helped u plz MARK as brianliest

38.

Define state motion

Answer»

Hii there

here is your answer

The state of motion of an object is defined by its velocity - SPEED with a direction. An object at rest has zero velocity will remain with zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted UPON by an unbalanced force.

Hope it helped u

plz MARK as brianliest

Discussion

39.	What are different types of errors occurring in measurement? how they are minimized
Answer» Answer: There are two types of errors, systematic and random. It is IMPORTANT for the SURVEYOR to understand the difference between the two errors in order to minimize them. Systematic errors are caused by the surveying equipment, OBSERVATION methods, and certain environmental factors. hope it helps plz mark me as a BRAINLIEST

39.

What are different types of errors occurring in measurement? how they are minimized

Answer»

Answer:

There are two types of errors, systematic and random. It is IMPORTANT for the SURVEYOR to understand the difference between the two errors in order to minimize them. Systematic errors are caused by the surveying equipment, OBSERVATION methods, and certain environmental factors.

hope it helps

plz mark me as a BRAINLIEST

Discussion

40.	A horizontal compass is placed 0.800 cm due South from a straight vertical wire carrying a 6.00 A current in the direction shown in the figure above. The horizontal component of the earth's magnetic field at this location is Be = 4.50×10-5 T and points North.The angle between the compass needlepoint and the East is 163 degrees celsiusWhat is the magnitude of the B-field at the position of the compass?
Answer» BCOS(73)=Be B=Be/cos(73)=15.4×10^-5

40.

A horizontal compass is placed 0.800 cm due South from a straight vertical wire carrying a 6.00 A current in the direction shown in the figure above. The horizontal component of the earth's magnetic field at this location is Be = 4.50×10-5 T and points North.The angle between the compass needlepoint and the East is 163 degrees celsiusWhat is the magnitude of the B-field at the position of the compass?

Answer»

BCOS(73)=Be

B=Be/cos(73)=15.4×10^-5

Discussion

41.	What are the advantages of the neutron diffraction method?
Answer» Hii there here is your ANSWER large SAMPLE needed - one of the BIGGEST disadvantage; for the good EXPERIMENT we need the sample volume of few (2-3) cc. small neutron flux - the reactor provide small neutron flux so the collecting time can be long. Hope it helped u plz mark as brianliest

41.

What are the advantages of the neutron diffraction method?

Answer»

Hii there

here is your ANSWER

large SAMPLE needed - one of the BIGGEST disadvantage; for the good EXPERIMENT we need the sample volume of few (2-3) cc.

small neutron flux - the reactor provide small neutron flux so the collecting time can be long.

Hope it helped u

plz mark as brianliest

Discussion

42.	Moment of inertia of a solid cylinder of mass,length and radius about its own axis is
Answer» Answer: $hllw.......$ EXPLANATION: The moment of inertia of SOLID cylinder about its own axis is the same as its moment of inertia about an axis PASSING through its centre of gravity and perpendicular to its length. The relation between its length and RADIUS R is.

42.

Moment of inertia of a solid cylinder of mass,length and radius about its own axis is

Answer»

Answer:

$hllw.......$

EXPLANATION:

The moment of inertia of SOLID cylinder about its own axis is the same as its moment of inertia about an axis PASSING through its centre of gravity and perpendicular to its length. The relation between its length and RADIUS R is.

Discussion

43.	What are the ethics are required to be followed by the media
Answer» Explanation: MEDIA ethics is basically a codification of some of the basic principles of ethics such as ACCURACY, objectivity, TRUTH, honesty, FAIRNESS, impartiality, piracy etc.

43.

What are the ethics are required to be followed by the media

Answer»

Explanation:

MEDIA ethics is basically a codification of some of the basic principles of ethics such as ACCURACY, objectivity, TRUTH, honesty, FAIRNESS, impartiality, piracy etc.

Discussion

44.	A 6.0 m high tank is full of water , a hole appears at its middle . What is the speed of efflux?
Answer» Answer:As per the TORRICELLI's law for Newtonian fluids, the DENSITY of efflux of a fluid PASSING through a sharp-edged hole at the bottom of a tank filled with the fluid to a depth of h is the same as the speed that a body WOULD acquire in a freely falling condition when falling from a HEIGHT h.

44.

A 6.0 m high tank is full of water , a hole appears at its middle . What is the speed of efflux?

Answer»

Answer:As per the TORRICELLI's law for Newtonian fluids, the DENSITY of efflux of a fluid PASSING through a sharp-edged hole at the bottom of a tank filled with the fluid to a depth of h is the same as the speed that a body WOULD acquire in a freely falling condition when falling from a HEIGHT h.

Discussion

45.	Find the rms speed of hydrogen molecule at 27degree Celsius
Answer» Answer: The ROOT MEAN SQUARE velocity of hydrogen MOLECULE at 27oC is ....υH....

45.

Find the rms speed of hydrogen molecule at 27degree Celsius

Answer»

Answer:

The ROOT MEAN SQUARE velocity of hydrogen MOLECULE at 27oC is ....υH....

Discussion

46.	A body is said to be a rigid body when it has a perfectly definite............... and ...............?
Answer» EXPLANATION: SHAPE and volume hope this HELPS you cheers :)

46.

A body is said to be a rigid body when it has a perfectly definite............... and ...............?

Answer»

EXPLANATION:

SHAPE and volume

hope this HELPS you

cheers :)

Discussion

47.	Wheels of harvesting machines used in paddy fields are connected using wide chains what is the scientific principle behind it
Answer» Answer: This help in PULLING the harvesting MACHINE easily because generally PADDY FIELD is muddy.

47.

Wheels of harvesting machines used in paddy fields are connected using wide chains what is the scientific principle behind it

Answer»

Answer:

This help in PULLING the harvesting MACHINE easily because generally PADDY FIELD is muddy.

Discussion

48.	Why do some alpha particles rebound backwards
Answer» Answer: Like charges repel, so the positive alpha PARTICLES were being REPELLED by positive charges. The very small number of alpha particles COMING straight back suggested that the positive charge and MASS are concentrated in a TINY volume in the atom (the nucleus).

48.

Why do some alpha particles rebound backwards

Answer»

Answer:

Like charges repel, so the positive alpha PARTICLES were being REPELLED by positive charges. The very small number of alpha particles COMING straight back suggested that the positive charge and MASS are concentrated in a TINY volume in the atom (the nucleus).

Discussion

49.	What is the relation between liniervelouty and angulas velocity
Answer» ANSWER: the relationship between linear and ANGULAR VELOCITIES is...... in the image hope it will HELP u

49.

What is the relation between liniervelouty and angulas velocity

Answer»

ANSWER:

the relationship between linear and ANGULAR VELOCITIES is...... in the image

hope it will HELP u

Discussion

50.	25. The magnitude of change in velocity of a particlehaving speed v is v during a time interval delta t whilemoving in a uniform circular motion. The magnitudeof average force on the particle is proportional to
Answer» ANSWER: FORCE is PROPORTIONAL to v/delta t Explanation: Force=ma a=v/t

50.

25. The magnitude of change in velocity of a particlehaving speed v is v during a time interval delta t whilemoving in a uniform circular motion. The magnitudeof average force on the particle is proportional to

Answer»

ANSWER:

FORCE is PROPORTIONAL to v/delta t

Explanation:

Force=ma

a=v/t

Discussion

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