67486 + Interview Questions in Secondary School in Physics

1.	What is the difference sound produced by chenda and edakka
Answer» Answer: chenda is DONE in order to PRODUCE HIGHLY resonating sound . edakka produce an amazing variety of soft sounds. hope you LIKE

1.

What is the difference sound produced by chenda and edakka

Answer»

Answer:

chenda is DONE in order to PRODUCE HIGHLY resonating sound .

edakka produce an amazing variety of soft sounds.

hope you LIKE

Discussion

2.	Tides rising above the surface level af the sea.
Answer» Ice MELTING from LAND into the ocean, WARMING waters that expand, a slowing Gulf Stream, and sinking land all contribute to SEA level rise.

2.

Tides rising above the surface level af the sea.

Answer»

Ice MELTING from LAND into the ocean, WARMING waters that expand, a slowing Gulf Stream, and sinking land all contribute to SEA level rise.

Discussion

3.	Define average velocity and how is it calculated
Answer» When a body has non uniform MOTION, it's velocity changes from TIME to time. The sum of the INITIAL and FINAL Velocity of an object is it's average velocity. Vav = u+v/2

3.

Define average velocity and how is it calculated

Answer»

When a body has non uniform MOTION, it's velocity changes from TIME to time. The sum of the INITIAL and FINAL Velocity of an object is it's average velocity. Vav = u+v/2

Discussion

4.	A rotating shaft carries four masses A, B, C and D which are radially attached to it. The masscentres are 30 mm, 38 mm, 40 mm and 35 mm respectively from the axis of rotation. The massesA, C and D are 7.5 kg, 5 kg and 4 kg respectively. The axial distances between the planes ofrotation of A and B is 400 mm and between B and C is 500 mm. The masses A and C are at rightangles to each other. Find for a complete be,1. the angles between the masses B and D from mass A,2. the axial distance between the planes of rotation of C and D,3. the magnitude of mass B.
Answer» Answer: 2 Explanation: there is so many AXIAL distance between the PLANES of ROTATION of CARD c and d ok KYA

4.

A rotating shaft carries four masses A, B, C and D which are radially attached to it. The masscentres are 30 mm, 38 mm, 40 mm and 35 mm respectively from the axis of rotation. The massesA, C and D are 7.5 kg, 5 kg and 4 kg respectively. The axial distances between the planes ofrotation of A and B is 400 mm and between B and C is 500 mm. The masses A and C are at rightangles to each other. Find for a complete be,1. the angles between the masses B and D from mass A,2. the axial distance between the planes of rotation of C and D,3. the magnitude of mass B.

Answer»

Answer:

2

Explanation:

there is so many AXIAL distance between the PLANES of ROTATION of CARD c and d ok KYA

Discussion

5.	Helpppppppppppppppppppppp
Answer» ANSWER: stomata chlorophyll Parasitic plants Nitrogen fixation. $\\ \\ \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty$ HOPE IT HELPS........

5.

Helpppppppppppppppppppppp

Answer»

ANSWER:

stomata
chlorophyll
Parasitic plants
Nitrogen fixation.

$\\ \\ \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty \infty$

HOPE IT HELPS........

Discussion

6.	Initial velocity of a particle moving along a straight line with constant acceleration is 20+ or - 2 m/s, if it's acceleration us a= 5+ or - 0.1 m/s², then velocity of the particle with error, after time t in s is?
Answer» ANSWER: "+-" (and any subsequent words) was ignored because we limit queries to 32 words. Explanation: At time a particle is at It starts MOVING towards POSITIVE x-axis with CONSTANT acceleration (initial velocity=0). After 2 s, an additional acceleration of starts acting on the particle in negative y-direction also. FIND after next 2 s. (a) velocity and (b) coordinates of particle.

6.

Initial velocity of a particle moving along a straight line with constant acceleration is 20+ or - 2 m/s, if it's acceleration us a= 5+ or - 0.1 m/s², then velocity of the particle with error, after time t in s is?

Answer»

ANSWER:

"+-" (and any subsequent words) was ignored because we limit queries to 32 words.

Explanation:

At time

a particle is at

It starts MOVING towards POSITIVE x-axis with CONSTANT acceleration

(initial velocity=0). After 2 s, an additional acceleration of

starts acting on the particle in negative y-direction also. FIND after next 2 s.
(a) velocity and
(b) coordinates of particle.

Discussion

7.	Find the value of acceleration due to gravity at the depth of our by to below the Earth surface
Answer» Effect of depth on value of ACCELERATION due to gravity. Consider earth to be a homogeneous sphere of radius R and mass M with centre at O. Let g be the value of acceleration due to gravity at a point A on the SURFACE of earth. Then $\sf{g=\dfrac{GM}{R^2}}$ If $\sf{\rho}$ is the uniform density of the earth, then $\sf{M=\dfrac{4}{3}\pi\:R^3\rho}$ $\sf{\therefore\:g=\dfrac{G\times\dfrac{4}{3}\pi\:R^3\rho}{R^2}}$ $\sf{\implies\:g=\dfrac{4}{3}\pi\:GR\rho.....(1)}$ Let g' be the acceleration due to gravity at point B at a depth d below the surface of earth. The distance of the point B from the centre of the earth is (R-d). Tue earth can be supposed to be made of a smaller sphere of radius (R-d) and a spherical shell of thickness d. The body at B is INSIDE the spherical shell of thickness d. The FORCE on body of mass m at B due to spherical shell is zero. The body at B is outside the surface of smaller sphere of radius (R-d). The force on the body of mass m at B is due smaller sphere of earth of radius (R-d) is just as if the entire mass M' of the smaller sphere of earth is concentrated at the centre O. $\sf{\therefore\:g'=\dfrac{GM'}{\left(R-\right)^2}and}\\\sf{M'=\dfrac{4}{3}\pi\left(R-d\right)^3\rho}$ $\sf{g'=\dfrac{G\times\dfrac{4}{3}\pi\left(R-d\right)^3\rho}{\left(R-d\right)^2}}$ $\sf{\implies\:g'=\dfrac{4}{3}\pi\:G\left(R-d\right)\rho.....(2)}$ DIVIDING (2) by (1), we get $\sf{\dfrac{g'}{g}=\dfrac{\dfrac{4}{3}\pi\:G\left(R-d\right)\rho}{\dfrac{4}{3}\pi\:GR\rho}}\\\sf{=\dfrac{R-d}{R}}$ $\boxed{\sf{g'=g\left(1-\dfrac{d}{R}\right)}}$ From this we can say that value of acceleration due to gravity decreases with depth.

7.

Find the value of acceleration due to gravity at the depth of our by to below the Earth surface

Answer»

Effect of depth on value of ACCELERATION due to gravity.

Consider earth to be a homogeneous sphere of radius R and mass M with centre at O. Let g be the value of acceleration due to gravity at a point A on the SURFACE of earth. Then

$\sf{g=\dfrac{GM}{R^2}}$

If $\sf{\rho}$ is the uniform density of the earth, then

$\sf{M=\dfrac{4}{3}\pi\:R^3\rho}$

$\sf{\therefore\:g=\dfrac{G\times\dfrac{4}{3}\pi\:R^3\rho}{R^2}}$

$\sf{\implies\:g=\dfrac{4}{3}\pi\:GR\rho.....(1)}$

Let g' be the acceleration due to gravity at point B at a depth d below the surface of earth.

The distance of the point B from the centre of the earth is (R-d). Tue earth can be supposed to be made of a smaller sphere of radius (R-d) and a spherical shell of thickness d.

The body at B is INSIDE the spherical shell of thickness d. The FORCE on body of mass m at B due to spherical shell is zero.

The body at B is outside the surface of smaller sphere of radius (R-d). The force on the body of mass m at B is due smaller sphere of earth of radius (R-d) is just as if the entire mass M' of the smaller sphere of earth is concentrated at the centre O.

$\sf{\therefore\:g'=\dfrac{GM'}{\left(R-\right)^2}and}\\\sf{M'=\dfrac{4}{3}\pi\left(R-d\right)^3\rho}$

$\sf{g'=\dfrac{G\times\dfrac{4}{3}\pi\left(R-d\right)^3\rho}{\left(R-d\right)^2}}$

$\sf{\implies\:g'=\dfrac{4}{3}\pi\:G\left(R-d\right)\rho.....(2)}$

DIVIDING (2) by (1), we get

$\sf{\dfrac{g'}{g}=\dfrac{\dfrac{4}{3}\pi\:G\left(R-d\right)\rho}{\dfrac{4}{3}\pi\:GR\rho}}\\\sf{=\dfrac{R-d}{R}}$

$\boxed{\sf{g'=g\left(1-\dfrac{d}{R}\right)}}$

From this we can say that value of acceleration due to gravity decreases with depth.

Discussion

8.	If \|vector A+ vector B\|=\|A\|+\|B\| find the angle between A And B
Answer» Answer: Assuming A and B are vectors, there is a very well-known property, arising times and again in algebra, which is called the triangular inequality and states the following : \|A+B\|≤\|A\|+\|B\| It is in fact a fairly INTUITIVE result if we think about the vectors of the three-dimensional Euclidian space (our simple and BELOVED and intuitive space) ; geometrically, you can obtain the sum of the TWO vectors by following the path traced by the vectors as you make the tip of the previous vector coincide with the tail of the next one. So, if A and B are not aligned (colinear), you are going to obtain a TRIANGLE, hence the name : triangular inequality ! Now, the relation states that the length of the sum is smaller or equals to the sum of the length of the other two. What does our triangle look like if they are exactly EQUAL ? Well, it doesn’t look like a triangle ; it looks like a straight-line, that is, the vectors must in fact be colinear in the end. Meaning that they have the same direction, you obtain, finally, that the angle in this case must be zero.

8.

If |vector A+ vector B|=|A|+|B| find the angle between A And B

Answer»

Answer:

Assuming A and B are vectors, there is a very well-known property, arising times and again in algebra, which is called the triangular inequality and states the following :

|A+B|≤|A|+|B|

It is in fact a fairly INTUITIVE result if we think about the vectors of the three-dimensional Euclidian space (our simple and BELOVED and intuitive space) ; geometrically, you can obtain the sum of the TWO vectors by following the path traced by the vectors as you make the tip of the previous vector coincide with the tail of the next one.

So, if A and B are not aligned (colinear), you are going to obtain a TRIANGLE, hence the name : triangular inequality ! Now, the relation states that the length of the sum is smaller or equals to the sum of the length of the other two. What does our triangle look like if they are exactly EQUAL ? Well, it doesn’t look like a triangle ; it looks like a straight-line, that is, the vectors must in fact be colinear in the end.

Meaning that they have the same direction, you obtain, finally, that the angle in this case must be zero.

Discussion

9.	What is the movment of an object of mass m moving with avelocity v
Answer» ANSWER: Momentum is the quantity of motionof a MOVING BODY. In other words the Product of mass and velocity is CALLED momentum . Hope it HELPS you. Explanation: marks as barinkist

9.

What is the movment of an object of mass m moving with avelocity v

Answer»

ANSWER:

Momentum is the quantity of motionof a MOVING BODY. In other words the Product of mass and velocity is CALLED momentum . Hope it HELPS you.

Explanation:

marks as barinkist

Discussion

10.	Newton word used the word mass in motion to represent as
Answer» MASS in MOTION is TERMED as the Momentum of the object. Please MARK as brainliest if this has helped you

10.

Newton word used the word mass in motion to represent as

Answer»

MASS in MOTION is TERMED as the

Momentum of the object.

Please MARK as brainliest if this has helped you

Discussion

11.	Does Fan is the source of direct current by
Answer» $HTML 90%CSS 80%JavaScript 65%PHP 60%/* Make sure that padding behaves as expected / {box-sizing:border-box}/* Container for skill bars /.container { width: 100%; / Full width / background-color: #ddd; / Grey background /}.skills { text-align: right; / Right-align text / padding-top: 10px; / Add top padding / padding-bottom: 10px; / Add bottom padding / color: white; / White text color /}.html {width: 90%; background-color: #4CAF50;} / Green /.css {width: 80%; background-color: #2196F3;} / Blue /.js {width: 65%; background-color: #f44336;} / Red /.php {width: 60%; background-color: #808080;} / Dark Grey */$

Discussion

12.	Any 5 electrical appilances works with electric current as a source
Answer» Answer: 1. ELECTRIC COOKER 2. MOBILE 3.fridge 4. A.C 5. GRINDER

12.

Any 5 electrical appilances works with electric current as a source

Answer»

Answer:

1. ELECTRIC COOKER

2. MOBILE

3.fridge

4. A.C

5. GRINDER

Discussion

13.	If the person suffer from here sadness As well as farsightednes what problem does she have
Answer» ANSWER: HYPERMATROPIA EXPLANATION: HOPE the answer will HELP you

13.

If the person suffer from here sadness As well as farsightednes what problem does she have

Answer»

ANSWER:

HYPERMATROPIA

EXPLANATION:

HOPE the answer will HELP you

Discussion

14.	A balloon rubbed with synthetic cloth stick to the wall what force is responsible for this
Answer» ANSWER: ELECTROSTATIC FORCE. this will HELP U

14.

A balloon rubbed with synthetic cloth stick to the wall what force is responsible for this

Answer»

ANSWER:

ELECTROSTATIC FORCE. this will HELP U

Discussion

15.	A metallic sphere of 4kg and volume 2.5×10^-4 m^3 is half submerged in water. Find the buoyant force exerted by water on the sphere. Density of water= 1000kg/m^3.
Answer» Answer: EXPLANATION: Mass of ball m = 4 kg Density of ball ρ = 4000 kg/m3 VOLUME of the ball V = m/ρ = 4/4000 m3 = 10-3 m3. Buoyant FORCE or upthrust acting on the ball = Volume of water displaced x density of water x acceleration DUE to gravity = 10-3 m3 x 1000 kg/m3 x 9.8 m/s2 = 9.8 kg. m/s2 = 9.8 N.

15.

A metallic sphere of 4kg and volume 2.5×10^-4 m^3 is half submerged in water. Find the buoyant force exerted by water on the sphere. Density of water= 1000kg/m^3.

Answer»

Answer:

EXPLANATION:

Mass of ball m = 4 kg Density of ball ρ = 4000 kg/m3 VOLUME of the ball V = m/ρ = 4/4000 m3 = 10-3 m3.

Buoyant FORCE or upthrust acting on the ball = Volume of water displaced x density of water x acceleration DUE to gravity

= 10-3 m3 x 1000 kg/m3 x 9.8 m/s2 = 9.8 kg. m/s2 = 9.8 N.

Discussion

16.	Calculate the heat supplied in figure for complete cycle
Answer» ANSWER: no Explanation: IDONT KNOW this answer

16.

Calculate the heat supplied in figure for complete cycle

Answer»

ANSWER:

no

Explanation:

IDONT KNOW this answer

Discussion

17.	60. An electric heater of power 1000W has has a resistance of 10. The magnitude ofcurrent drawn by the electric heater is :এটা 1000w ক্ষমতাৰ বৈদ্যুতিক ইস্ত্ৰিৰ ৰােধ 102 হলে ইস্ত্রিৰটোৱে লােৱা বৈদ্যুতিকপ্রবাহৰ পৰিমাণৰ হ'ব ?a) 20A b 10A @ 15A d) 13A
Answer» <P>answer option B explanation power =1000 w resistance =10 p= i^2 r 1000 = i^2 r i^2 = 1000/10 =100 I^2 = 100 THEN I = 10 A

17.

60. An electric heater of power 1000W has has a resistance of 10. The magnitude ofcurrent drawn by the electric heater is :এটা 1000w ক্ষমতাৰ বৈদ্যুতিক ইস্ত্ৰিৰ ৰােধ 102 হলে ইস্ত্রিৰটোৱে লােৱা বৈদ্যুতিকপ্রবাহৰ পৰিমাণৰ হ'ব ?a) 20A b 10A @ 15A d) 13A

Answer»

<P>answer

option B

explanation

power =1000 w

resistance =10

p= i^2 *r

1000 = i^2 * r

i^2 = 1000/10

=100

I^2 = 100

THEN

I = 10 A

Discussion

18.	WHAT IS FAULTY THERMOMETERplease ans it is argent
Answer» ᏆᎢ ᎻᎪᏚ FᏆXᎬᎠ ᏆᎢᏚ ᎢᎬᎷᏢᎬᎡᎪᎢᏌᎡᎬ FᎡᎾᎷ 5 ᎠᎬᏩᎡᎬᎬ ᎢᎾ 95 ᎠᎬᏩᎡᎬᎬ ᏆᎢ ᏚᎻᎾᏔᏚ Ꭺ NᎾᎡᎷᎪᏞ ᎻᏌᎷᎪN ᏴᎾᎠY ᎢᎬᎷᏢᎬᎡᎪᎢᏌᎡᎬ 59 ᎠᎬᏩᎡᎬᎬ ᎪᏚ ᏆᎢ ᏆᏚ ᏔᎡᎾNᏩ. ᎻᎾᏢᎬ ᏆᎢ ᎻᎬᏞᏢᏚ ᏌᎻ...

18.

WHAT IS FAULTY THERMOMETERplease ans it is argent

Answer»

ᏆᎢ ᎻᎪᏚ FᏆXᎬᎠ ᏆᎢᏚ ᎢᎬᎷᏢᎬᎡᎪᎢᏌᎡᎬ FᎡᎾᎷ 5 ᎠᎬᏩᎡᎬᎬ ᎢᎾ 95 ᎠᎬᏩᎡᎬᎬ ᏆᎢ ᏚᎻᎾᏔᏚ Ꭺ NᎾᎡᎷᎪᏞ ᎻᏌᎷᎪN ᏴᎾᎠY ᎢᎬᎷᏢᎬᎡᎪᎢᏌᎡᎬ 59 ᎠᎬᏩᎡᎬᎬ ᎪᏚ ᏆᎢ ᏆᏚ ᏔᎡᎾNᏩ.

ᎻᎾᏢᎬ ᏆᎢ ᎻᎬᏞᏢᏚ ᏌᎻ...

Discussion

19.	the maas of 2m³ of steel is 15600 kg. calculate the density of Steel in SI units .
Answer» ANSWER: DENSITY $= \frac{mass}{volume} = \frac{15600}{2} = 7800kg \: per \: {m}^{3}$

19.

the maas of 2m³ of steel is 15600 kg. calculate the density of Steel in SI units .

Answer»

ANSWER:

DENSITY

$= \frac{mass}{volume} = \frac{15600}{2} = 7800kg \: per \: {m}^{3}$

Discussion

20.	I want to know how to sit ?
Answer» Answer: YEP! I WONDER how you are typing right now, standing? EXPLANATION:

20.

I want to know how to sit ?

Answer»

Answer:

YEP! I WONDER how you are typing right now, standing?

EXPLANATION:

Discussion

21.	Wavelength of radiation emitted when electron in hydrogen atom transist from 4th energy level to 2nd energy level
Answer» Answer: 486.27 nm Explanation: energy of 4TH shell =13.6/(4)^2=0.85 eV energy of 2nd shell =13.6/(2)^2=3.4 eV so energy emmited =3.4-0.85=2.55 eV E=hc/lambda so lambda=hc/E=1240/2.55=486.27 nm please mark my answer as brainliest and FOLLOW me

21.

Wavelength of radiation emitted when electron in hydrogen atom transist from 4th energy level to 2nd energy level

Answer»

Answer:

486.27 nm

Explanation:

energy of 4TH shell =13.6/(4)^2=0.85 eV

energy of 2nd shell =13.6/(2)^2=3.4 eV

so energy emmited =3.4-0.85=2.55 eV

E=hc/lambda

so lambda=hc/E=1240/2.55=486.27 nm

please mark my answer as brainliest and FOLLOW me

Discussion

22.	An object is placed at 50 cm from a concave mirror of radius of curvature 60 cm. find the image distance. what is the nature of the image?
Answer» Answer: answer is explained below Explanation: object distance:50cm radius:60cm so focal length:60/2=30cm now using the MIRROR formula, 1/f=1/u+1/v on keeping f, -u we get v. and then if v is POSITIVE then the image is formed in FRONT of the mirror and INVERTED.

22.

An object is placed at 50 cm from a concave mirror of radius of curvature 60 cm. find the image distance. what is the nature of the image?

Answer»

Answer:

answer is explained below

Explanation:

object distance:50cm

radius:60cm

so focal length:60/2=30cm

now using the MIRROR formula,

1/f=1/u+1/v

on keeping f, -u we get v.

and then if v is POSITIVE then the image is formed in FRONT of the mirror and INVERTED.

Discussion

23.	the wave length of the wave produced in the surface of water is 20cm if the wave velocity is 24ms-1 calculate the number of waves produced in one second and the time in which one wave is produced
Answer» EXPLANATION: as we KNOW that v=nx n=frequency ,x=wavelength 24=20/100×n n=120Hz n=1/t t=1/120

23.

the wave length of the wave produced in the surface of water is 20cm if the wave velocity is 24ms-1 calculate the number of waves produced in one second and the time in which one wave is produced

Answer»

EXPLANATION:

as we KNOW that

v=nx n=frequency ,x=wavelength

24=20/100×n

n=120Hz

n=1/t

t=1/120

Discussion

24.	Do charcoal is used for petroleum purification
Answer» Answer: Charcoal is a lightweight black carbon residue produced by removing water and other volatile constituents from animal and plant MATERIALS. Charcoal is usually produced by SLOW pyrolysis—the heating of wood or other organic materials in the absence of oxygen. This process is called charcoal burning. The finished charcoal consists largely of carbon. The advantage of burning charcoal compared to burning wood is the absence of water and other components. This allows charcoal to burn at higher temperatures, and give off very little smoke (regular wood can release a significant amount of STEAM, organic volatiles, and unburnt carbon particles—soot—in its smoke, when it is not BURNED completely

24.

Do charcoal is used for petroleum purification

Answer»

Answer:

Charcoal is a lightweight black carbon residue produced by removing water and other volatile constituents from animal and plant MATERIALS. Charcoal is usually produced by SLOW pyrolysis—the heating of wood or other organic materials in the absence of oxygen. This process is called charcoal burning. The finished charcoal consists largely of carbon.

The advantage of burning charcoal compared to burning wood is the absence of water and other components. This allows charcoal to burn at higher temperatures, and give off very little smoke (regular wood can release a significant amount of STEAM, organic volatiles, and unburnt carbon particles—soot—in its smoke, when it is not BURNED completely

Discussion

25.	Explain how the primary current increases as the current on the secondary side of the transformer increased.
Answer» Answer: when an account voltage is connected across the primary terminal of a TRANSFORMER,an alternating current Will flow.a voltage in the primary COIL which is opposite and NEARLY equal to the APPLIED voltage

25.

Explain how the primary current increases as the current on the secondary side of the transformer increased.

Answer»

Answer:

when an account voltage is connected across the primary terminal of a TRANSFORMER,an alternating current Will flow.a voltage in the primary COIL which is opposite and NEARLY equal to the APPLIED voltage

Discussion

26.	Write difference in between scalar and vector
Answer» ANSWER: scalar have only MAGNITUDE eg distance Vector have both direction and magnitude eg DISPLACEMENT

26.

Write difference in between scalar and vector

Answer»

ANSWER: scalar have only MAGNITUDE eg distance

Vector have both direction and magnitude eg DISPLACEMENT

Discussion

27.	The coifficent of self inductance of two coil l1 and l2 to induce and emf 25v in the coil change of current 1A has to be produce in 5 sec and 50ms resp the ratio of l1 and l2 wii be
Answer» ANSWER: HEY DUD there is MISTAKE in your QUESTION 50ms?

27.

The coifficent of self inductance of two coil l1 and l2 to induce and emf 25v in the coil change of current 1A has to be produce in 5 sec and 50ms resp the ratio of l1 and l2 wii be

Answer»

ANSWER:

HEY DUD there is MISTAKE in your QUESTION

50ms?

Discussion

28.	Can the direction of motion of a body change if its velocity is changing at uniform rate
Answer» $\huge{\underline{\underline{\color{black}{\bf{Answer:-}}}}}$ Yes this can HAPPEN in a redirected MOTION . A body thrown up moves under constant RETARDATION and from the highest point it BEGINS to fall downwards.

28.

Can the direction of motion of a body change if its velocity is changing at uniform rate

Answer»

$\huge{\underline{\underline{\color{black}{\bf{Answer:-}}}}}$

Yes this can HAPPEN in a redirected MOTION .

A body thrown up moves under constant RETARDATION and from the highest point it BEGINS to fall downwards.

Discussion

29.	find the work done in moving a particle along a vector S=(2i^_j^+4k^) meter, of the applied force is f=(3i^+2j^-2k^)newton answer a)4J b)-4J c) 2J d) none of these
Answer» Answer: -4J Explanation: just dot PRODUCT the TWO vectors WORK done=F.d

29.

find the work done in moving a particle along a vector S=(2i^_j^+4k^) meter, of the applied force is f=(3i^+2j^-2k^)newton answer a)4J b)-4J c) 2J d) none of these

Answer»

Answer:

-4J

Explanation:

just dot PRODUCT the TWO vectors

WORK done=F.d

Discussion

30.	Define Zero vector with example
Answer» EXPLANATION: HOPES it HELPS U ..................

30.

Define Zero vector with example

Answer»

EXPLANATION:

HOPES it HELPS U

..................

Discussion

31.	Two shms s1=asinwt and s2=bsinwt are superimosed on a particle.the s1 and s2 are along direction making angle 37 with each other1. paticle will show shm2.will not show shm3.will perform periodic motion but not shm4. motion will not be oscillatory
Answer» ANSWER: 1) the PARTICLE shows SHM Explanation: the RESULTANT SHM will have an amplitude of MAGNITUDE: A'= $\sqrt{a^{2}+b^{2} +2abCos(37)}$ Hope this answer was helpful :)

31.

Two shms s1=asinwt and s2=bsinwt are superimosed on a particle.the s1 and s2 are along direction making angle 37 with each other1. paticle will show shm2.will not show shm3.will perform periodic motion but not shm4. motion will not be oscillatory

Answer»

ANSWER:

1) the PARTICLE shows SHM

Explanation:

the RESULTANT SHM will have an amplitude of MAGNITUDE:

A'= $\sqrt{a^{2}+b^{2} +2abCos(37)}$

Hope this answer was helpful :)

Discussion

32.	The electric field due to a charged particle at a point 1.0 m away from it has magnitude 81NC . 1 What is the magnitude of the electric charge on the particle? What is the magnitude of the electrostatic force on a particle having the same charge kept at a distance of 2.0 m from it?
Answer» EXPLANATION: The electric FIELD due to a charged particle according to Coulomb's law is @$E=k\frac {q}{r^2}@$ where @$k=9\cdot10^9Nm^2C^{-2}@$. Thus @$q=\frac{E\cdot r^2}{k}=\frac{81 NC^{-1}\cdot1m^2}{9\cdot 10^9 Nm^2C^{-2}}=9\cdot 10^{-9}[email protected]$ is chage of the particle. The magnitude of the electrostatic force between two PARTICLES with chage @[email protected]$ at @[email protected]$ is @$F=k\frac{q^2}{R^2}=9\cdot 10^9\frac{81\cdot 10^{-18}}{4}=1.8\cdot 10^{-7}[email protected]$ ANSWER: The magnitude of the electric charge on the particle is @$9\cdot 10^{-9}[email protected]$ . The magnitude of the electrostatic force on a particle having the same charge kept at a distance of 2.0 m from it is @$1.8\cdot 10^{-7}[email protected]$ .

32.

The electric field due to a charged particle at a point 1.0 m away from it has magnitude 81NC . 1 What is the magnitude of the electric charge on the particle? What is the magnitude of the electrostatic force on a particle having the same charge kept at a distance of 2.0 m from it?

Answer»

EXPLANATION:

The electric FIELD due to a charged particle according to Coulomb's law is @$E=k\frac {q}{r^2}@$ where @$k=9\cdot10^9Nm^2C^{-2}@$. Thus @$q=\frac{E\cdot r^2}{k}=\frac{81 NC^{-1}\cdot1m^2}{9\cdot 10^9 Nm^2C^{-2}}=9\cdot 10^{-9}[email protected]$ is chage of the particle. The magnitude of the electrostatic force between two PARTICLES with chage @[email protected]$ at @[email protected]$ is

@$F=k\frac{q^2}{R^2}=9\cdot 10^9\frac{81\cdot 10^{-18}}{4}=1.8\cdot 10^{-7}[email protected]$

ANSWER: The magnitude of the electric charge on the particle is @$9\cdot 10^{-9}[email protected]$ . The magnitude of the electrostatic force on a particle having the same charge kept at a distance of 2.0 m from it is @$1.8\cdot 10^{-7}[email protected]$ .

Discussion

33.	What happens if chemical bond does not form?
Answer» It WOULD RESULT in no FORMATION of COMPOUNDS.

33.

What happens if chemical bond does not form?

Answer»

It WOULD RESULT in no FORMATION of COMPOUNDS.

Discussion

34.	Write the difference between mass and weight
Answer» $\huge{\underline{\underline{\color{black}{\bf{Answer:-}}}}}$ Difference between Mass and weight mass is the measure of inertia WHEREAS weight is the measure of gravity . mass is a scalar quantity whereas weight is a vector quantity . mass cannot be zero for a body whereas weight of a body is zero at the centre of the earth . mass is an essential property of material BODIES whereas weight is not an essential property . mass is not affected by the presence of other body whereas weight is affected by the presence of other body . the unit of mass arevgram, kilogram etc and the unit of weight are DYNE, Newton etc.

34.

Write the difference between mass and weight

Answer»

$\huge{\underline{\underline{\color{black}{\bf{Answer:-}}}}}$

Difference between Mass and weight

mass is the measure of inertia WHEREAS weight is the measure of gravity .
mass is a scalar quantity whereas weight is a vector quantity .
mass cannot be zero for a body whereas weight of a body is zero at the centre of the earth .
mass is an essential property of material BODIES whereas weight is not an essential property .
mass is not affected by the presence of other body whereas weight is affected by the presence of other body .
the unit of mass arevgram, kilogram etc and the unit of weight are DYNE, Newton etc.

Discussion

35.	A car moves 8 km due east from A to B and then 6 km due north from B to C . Find the actual distance travelled by the car and displacement.
Answer» ANSWER: I THINK it will TRAVEL 14 KM

35.

A car moves 8 km due east from A to B and then 6 km due north from B to C . Find the actual distance travelled by the car and displacement.

Answer»

ANSWER: I THINK it will TRAVEL 14 KM

Discussion

36.	The main landing gear of a transport aircraft exerts a maximum force by the retraction actuator is 12000 lb and the actuator stroke is 14.25 in. Assume following: The gear must be fully retracted in 10 second. There are two main gear unit and a nose gear which are identical 3) Maximum system pressure is 3000 psi. The required actuator size, that is, cylinder bore and piston rod diameters. Use a 2:1 area ratio for the rod and head end areas. What does this ratio imply for the performance of landing gear. Calculate the hydraulic power (in Horse power) to retract all three landing gear units simultaneously.
Answer» Answer: The main landing gear of a transport aircraft exerts a maximum FORCE by the retraction actuator is 12000 lb and the actuator stroke is 14.25 in. Assume following: The gear must be fully retracted in 10 second. There are two main gear unit and a nose gear which are identical 3) Maximum system pressure is 3000 psi. The required actuator size, that is, cylinder bore and piston rod diameters. Use a 2:1 area ratio for the rod and head end areas. What does this ratio imply for the performance of landing gear. Calculate the hydraulic power (in HORSE power) to retract all three landing gear UNITS simultaneously.

36.

The main landing gear of a transport aircraft exerts a maximum force by the retraction actuator is 12000 lb and the actuator stroke is 14.25 in. Assume following: The gear must be fully retracted in 10 second. There are two main gear unit and a nose gear which are identical 3) Maximum system pressure is 3000 psi. The required actuator size, that is, cylinder bore and piston rod diameters. Use a 2:1 area ratio for the rod and head end areas. What does this ratio imply for the performance of landing gear. Calculate the hydraulic power (in Horse power) to retract all three landing gear units simultaneously.

Answer»

Answer:

The main landing gear of a transport aircraft exerts a maximum FORCE by the retraction actuator is 12000 lb and the actuator stroke is 14.25 in. Assume following: The gear must be fully retracted in 10 second. There are two main gear unit and a nose gear which are identical 3) Maximum system pressure is 3000 psi.

The required actuator size, that is, cylinder bore and piston rod diameters. Use a 2:1 area ratio for the rod and head end areas. What does this ratio imply for the performance of landing gear.

Calculate the hydraulic power (in HORSE power) to retract all three landing gear UNITS simultaneously.

Discussion

37.	Significance of magic number in nucler physics
Answer» ANSWER: KINDLY MARK as BRAINLIEST

37.

Significance of magic number in nucler physics

Answer»

ANSWER:

KINDLY MARK as BRAINLIEST

Discussion

38.	Which are the possible map places for 10th std exam?? please include the important places names
Answer» Answer: Important Maps of "Nationalism in India" (History) class 10th Important Congress session. Important Nationalism movement took places. Maps of "MAJOR Soil TYPES" (Geography) Class 10th. Important Dams Of India (Geography) Major Producer States Of Jute, Cotton, RUBBER, Sugarcane, TEA, Coffee. Major Rice growing AREAS.

38.

Which are the possible map places for 10th std exam?? please include the important places names

Answer»

Answer:

Important Maps of "Nationalism in India" (History) class 10th

Important Congress session.

Important Nationalism movement took places.

Maps of "MAJOR Soil TYPES" (Geography) Class 10th.

Important Dams Of India (Geography)

Major Producer States Of Jute, Cotton, RUBBER, Sugarcane, TEA, Coffee.

Major Rice growing AREAS.

Discussion

39.	What is the length of the size of red blood cell
Answer» ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ $\huge\boxed{question}$ what is the length of the size of red BLOOD cell? $\huge{\pink {\sf\underline{Answer}}}$ It is of diameter of about 6.2 - 8.2 um They are IMPORTANT to maintain blood platelets. It is a type of blood cell found in bone marrow . It contains a PROTEIN called HAEMOGLOBIN which carry oxygen from lungs to heart. $\rule{300}{1.5}$ $Thanks♡$ ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

39.

What is the length of the size of red blood cell

Answer»

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

$\huge\boxed{question}$

what is the length of the size of red BLOOD cell?

$\huge{\pink {\sf\underline{Answer}}}$

It is of diameter of about 6.2 - 8.2 um

They are IMPORTANT to maintain blood platelets.

It is a type of blood cell found in bone marrow . It contains a PROTEIN called HAEMOGLOBIN which carry oxygen from lungs to heart.

$\rule{300}{1.5}$

$Thanks♡$

▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

Discussion

40.	Can you tell me how should I behave
Answer» ANSWER: your BEHAVIOUR very GOOD

40.

Can you tell me how should I behave

Answer»

ANSWER:

your BEHAVIOUR very GOOD

Discussion

41.	An isosceles right angle current carrying loopPQR is placed in a uniform mf B pointing along PR if the mf acting on the arm PQ is F, then the mf which acts on the armQR will be1-F2-F/√23-√2F4-(-F
Answer» ANSWER: I ACCD I have to SAY that I am not a FAN of the most

41.

An isosceles right angle current carrying loopPQR is placed in a uniform mf B pointing along PR if the mf acting on the arm PQ is F, then the mf which acts on the armQR will be1-F2-F/√23-√2F4-(-F

Answer»

ANSWER:

I ACCD I have to SAY that I am not a FAN of the most

Discussion

42.	If 400cal written in the place of 400 kcal Will I get full marks..??
Answer» ANSWER: no Explanation: 400kcal =400000cal as 1kcal =1000cal

42.

If 400cal written in the place of 400 kcal Will I get full marks..??

Answer»

ANSWER:

no

Explanation:

400kcal =400000cal as 1kcal =1000cal

Discussion

43.	If the area of cross section of pipe increases the velocity of the flow of liquid
Answer» ANSWER: DECREASE EXPLANATION: rate of flow = A × V = constant

43.

If the area of cross section of pipe increases the velocity of the flow of liquid

Answer»

ANSWER:

DECREASE

EXPLANATION:

rate of flow = A × V = constant

Discussion

44.	Can the kinetic energy of a body be negative? (Justify your answer)I know this but you know, giving away points for free.
Answer» Answer: Hey MATE here is your answer No the kinetic energy of a body cannot be NEGATIVE it can either be positive or zero . Hope It helps you MARK as BRAINLIEST ❤️

44.

Can the kinetic energy of a body be negative? (Justify your answer)I know this but you know, giving away points for free.

Answer»

Answer:

Hey MATE here is your answer

No the kinetic energy of a body cannot be NEGATIVE it can either be positive or zero .

Hope It helps you

MARK as BRAINLIEST ❤️

Discussion

45.	Explain the use of seat belt in a car. pls answer this question please
Answer» See if there is no seat belt in our CAR if you meet an accident you will FLY off from your car BREAKING the gasses of your car and FALL off.

45.

Explain the use of seat belt in a car. pls answer this question please

Answer»

See if there is no seat belt in our CAR if you meet an accident you will FLY off from your car BREAKING the gasses of your car and FALL off.

Discussion

46.	If A+B = A + B then angle between Aand B will be die Allkor .(a) 90°(b) 120°0°(d) 60° (2001)
Answer» ANSWER: C) 0 DEGREE............

46.

If A+B = A + B then angle between Aand B will be die Allkor .(a) 90°(b) 120°0°(d) 60° (2001)

Answer»

ANSWER:

C) 0 DEGREE............

Discussion

47.	How to pronounce the letters written after "Given":
Answer» Answer: Modulus of Force Vector EXPLANATION: Modulus of any vector quantity gives the magnitude of that vector quantity . Here the TWO staright lines ENCLOSING the F vector signify that only magnitude of force has been taken into account . You can also, THUS , read it as magnitude of force . Thank you

47.

How to pronounce the letters written after "Given":

Answer»

Answer:

Modulus of Force Vector

EXPLANATION:

Modulus of any vector quantity gives the magnitude of that vector quantity .

Here the TWO staright lines ENCLOSING the F vector signify that only magnitude of force has been taken into account . You can also, THUS , read it as magnitude of force .

Thank you

Discussion

48.	The calorific value of cooking gas is 50kj/g .what does it mean
Answer» ${\huge{\color{purple}{\mathbb{\boxed{Hello}}}}}$ It MEANS the UNIT of the FOOD that is PRESENT in it

48.

The calorific value of cooking gas is 50kj/g .what does it mean

Answer»

${\huge{\color{purple}{\mathbb{\boxed{Hello}}}}}$

It MEANS the UNIT of the FOOD that is PRESENT in it

Discussion

49.	Describe how the geothermal power station generates electricity?
Answer» Answer: MARK as brainliest and follow me plz Explanation: Geothermal power plants use steam to produce ELECTRICITY. The steam comes from reservoirs of hot WATER FOUND a few miles or more below the earth's surface. The steam rotates a turbine that ACTIVATES a generator, which produces electricity.

49.

Describe how the geothermal power station generates electricity?

Answer»

Answer: MARK as brainliest and follow me plz

Explanation: Geothermal power plants use steam to produce ELECTRICITY. The steam comes from reservoirs of hot WATER FOUND a few miles or more below the earth's surface. The steam rotates a turbine that ACTIVATES a generator, which produces electricity.

Discussion

50.	Find the PD require to pass current of 5a through a conductor of resistance 8ohms
Answer» ANSWER: 8/5=1.6 it is the CORRECT answer of this QUESTION

50.

Find the PD require to pass current of 5a through a conductor of resistance 8ohms

Answer»

ANSWER:

8/5=1.6 it is the CORRECT answer of this QUESTION

Discussion

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