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Recent questions tagged physics
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A greater effort is required to stop a bullet from the gun than to stop a bullet of same mass which is thrown by the hand. This is due to
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 3, 2017
by
priyanka.c
1
answer
The law of inertia was formulated by
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 3, 2017
by
priyanka.c
1
answer
When a bus takes a sharp turn a person sitting in the bus experiences a force acting away from the centre of the curved path. This is due to
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 3, 2017
by
priyanka.c
0
answers
Read the passage and answer the question below <br><br> Different objects may take different amounts of time to cover a given distance. Some of them move fast and some move slowly. The rate at which objects move can be different. Also, different objects can move at the same rate. One of the ways of measuring the rate of motion of an object is to find out the distance travelled by the object in unit time. This quantity is referred to as speed. The SI unit of speed is ms-1. To specify the speed of an object we require only its magnitude. The speed of an object need not be a constant. In most cases, objects will be in non-uniform motion. Therefore we describe the rate of motion of such objects in terms of their average speed. The average speed of an object is the total distance divided by the total time taken. If the speed of the object is v, then v = s/t, where s I the distance travelled and t is the time taken. <br><br> QUESTION : When an object covers unequal distances in equal intervals of time then it is said to be
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 3, 2017
by
priyanka.c
1
answer
Read the following passage and answer the question below <br><br> Different objects may take different amounts of time to cover a given distance. Some of them move fast and some move slowly. The rate at which objects move can be different. Also, different objects can move at the same rate. One of the ways of measuring the rate of motion of an object is to find out the distance travelled by the object in unit time. This quantity is referred to as speed. The SI unit of speed is ms-1. To specify the speed of an object we require only its magnitude. The speed of an object need not be a constant. In most cases, objects will be in non-uniform motion. Therefore we describe the rate of motion of such objects in terms of their average speed. The average speed of an object is the total distance divided by the total time taken. If the speed of the object is v, then v = s/t, where s I the distance travelled and t is the time taken. <br><br> QUESTION : An object travels from A to B at 40 m/s and from B to A at 60m/s. Then its average speed is
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 3, 2017
by
priyanka.c
1
answer
If the radius of the earth becomes twice its original radius without change in its mass, what will happen to your weight?
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 3, 2017
by
priyanka.c
1
answer
An astronaut tries to drop an object from a height of 10 m on the surface of the moon. How long will it take to reach the moon's surface? [take g= $10m/s^2$]
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 3, 2017
by
priyanka.c
1
answer
A compound microscope has lenses of focal length 1cm & 3cm. An object is pl
physics
asked
Nov 2, 2017
by
aakashadhikary9861
1
answer
The value of g is
cbsc
class 9
olympiad
science
physics
t3
asked
Nov 2, 2017
by
priyanka.c
1
answer
The kinetic energy of a ball of mass 1kg moving at a speed of 20 cm/s is
cbsc
class 9
olympiad
science
physics
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asked
Nov 2, 2017
by
priyanka.c
1
answer
What will be the time taken to do 1320 J of work at the rate of 110W?
cbsc
class 9
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science
physics
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asked
Nov 2, 2017
by
priyanka.c
1
answer
The sensory cells of cochlea are called
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physics
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Nov 2, 2017
by
priyanka.c
1
answer
The term that describes how the brain interprets the frequency of sound is called
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class 9
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science
physics
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Nov 2, 2017
by
priyanka.c
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answer
The frequency of a sound wave has 1000 Hz and a wavelength of 34 cm. How long will it take to travel 1 km?
cbsc
class 9
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science
physics
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asked
Nov 2, 2017
by
priyanka.c
1
answer
The property of sound which is used in stethoscope is
cbsc
class 9
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physics
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asked
Nov 2, 2017
by
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1
answer
The wavelength of a sound wave whose frequency is 300 Hz and speed 330 m/s is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
When we increase the loudness of sound produced by a radio, the property of the sound wave that changes is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
Ultrasonic waves are used for detecting objects under water. What technique is used for this ?
cbsc
class 9
olympiad
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physics
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asked
Nov 2, 2017
by
priyanka.c
1
answer
In which of the following cases is the potential energy of the spring minimum?
cbsc
class 9
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science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
The work done by the weight of a 1.5 kg mass when it moves through a distance of 2m is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
Read the passage below and answer the question <br><br> If the displacement of an object is perpendicular to the force acting on it, the work done by the force on the object is zero. Consider for example, the force of gravity acting on an aero plane flying in the sky. The force of gravity is in the downward direction, whereas the aero plane's displacement is in the horizontal direction, I.e; the force and the displacement are perpendicular to each other. There is no displacement in the direction of the force of gravity, and therefore, the work done by it on the aero plane is zero.<br><br> QUESTION : When the porter climbs up a staircase the work done is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
Force of friction acting on a body on a horizontal road
physics
asked
Nov 2, 2017
by
gandhimathi.p.h
1
answer
V^2=u^2+2as 0+2×gain 30×2 =_/20 By using s=v^2/2(mu×mg) Answer:4m
physics
asked
Nov 2, 2017
by
gandhimathi.p.h
1
answer
Find the height at which acceleration due to gravity is zero?
physics
asked
Nov 2, 2017
by
prithu556
0
answers
Find the height at which acceleration due to gravity is zero
physics
asked
Nov 2, 2017
by
prithu556
1
answer
Read the passage carefully and answer question <br><br> If the displacement of an object is perpendicular to the force acting on it, the work done by the force on the object is zero. Consider for example, the force of gravity acting on an aero plane flying <br><br> in the sky. The force of gravity is in the downward direction, whereas the aero plane's displacement is in the horizontal direction, I.e; the force and the displacement are perpendicular to each other. There is no displacement in the direction of the force of gravity, and therefore, the work done by it on the aero plane is zero.<br><br> QUESTION : A porter is moving a distance of 'd' m, with a heavy load on his head. The work done by this porter is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
Density of gold is $19300 kg/m^3$. Then its relative density is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
An object which has a mass of 15 kg is taken to the moon. What will be its mass there?
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class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
The velocity of a ball, which is projected with an initial velocity u, to a height h, its maximum height is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
The momentum of an object whose mass is 10 kg and velocity 15 m/s is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
The slope of displacement graph indicates
cbsc
class 9
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physics
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Nov 2, 2017
by
priyanka.c
1
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A train starts from station A and attains a velocity of 30m/s in one minute. Then its acceleration is
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
If a particle covers equal distances in equal intervals of time, it is said to be
cbsc
class 9
olympiad
science
physics
t1
asked
Nov 2, 2017
by
priyanka.c
1
answer
Which is the incorrect statement ?
neet
2017
physics
past paper
t1
q50
asked
Nov 2, 2017
by
meena.p
0
answers
Mixture ofchloroxylenol and terpineol acts as
neet
2017
physics
past paper
t1
q49
asked
Nov 2, 2017
by
meena.p
0
answers
If a glass slab of refractive index 1.5 is immersed in water of refractive
physics
asked
Nov 2, 2017
by
ramanritu21
1
answer
$HgCl_2$ and $I_2$ both when dissolved in water containing $I^{-}$ ions the pair of species formed is :
neet
2017
physics
past paper
t1
q48
asked
Nov 2, 2017
by
meena.p
0
answers
Which of the following pairs of compounds is isoelectronic and isostructural ?
neet
2017
physics
past paper
t1
q47
asked
Nov 2, 2017
by
meena.p
0
answers
Vander walls équation of state
physics
asked
Nov 2, 2017
by
venkatporipireddy54
1
answer
Bander walls équation of state
physics
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Nov 2, 2017
by
venkatporipireddy54
1
answer
A singly ionized helium atom in an excited state (n = 4) emits a photon of
physics
asked
Nov 2, 2017
by
soujanyavihan
1
answer
Four spheres each of mass m and diameter 2r are located with their centres
physics
asked
Nov 2, 2017
by
raviyadav0259
1
answer
Derive an expression for the loss of energy when 2 conductors at different
physics
asked
Nov 2, 2017
by
kakumalu71
0
answers
A uniform thin rod of length l & mass m is bent at the middle point o. Cons
physics
asked
Nov 2, 2017
by
anjali6june2001
1
answer
What would happen if the external field is increasing 1. Parallel to dipo
physics
asked
Nov 1, 2017
by
dasrishita1
1
answer
What happens if the electric field is non uniform
physics
asked
Nov 1, 2017
by
dasrishita1
1
answer
Define torque acting on a dipole moment placed in a uniform electric field.
physics
asked
Nov 1, 2017
by
dasrishita1
1
answer
A uniform cube of side l and mass m rests on a rough horizontal table. A ho
physics
asked
Nov 1, 2017
by
palakshi.gandhi03
1
answer
State Gauss's theorem. Derive an expression for the electric field due to a
physics
asked
Nov 1, 2017
by
rajsk.2014
1
answer
Which line of the graph represents the greatest speed?
cbsc
class 9
olympiad
science
physics
t6
asked
Nov 1, 2017
by
priyanka.c
1
answer
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