Recent questions tagged science

Which of the following are correct statements. When a wave passes through a medium 1. the particles of the medium are disturbed 2. the energy of the medium is disturbed 3. the velocity of particles through the medium remains a constant 4. there is a change in density and pressure of the particles

asked Oct 31, 2017 by priyanka.c

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The relation between wavelength, velocity and frequency of sound waves is given by

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An object moving with a speed greater than the speed of sound is said to have

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Which of the following increases as wavelength decreases if the velocity remains a constant.

asked Oct 31, 2017 by priyanka.c

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Which of the following statements are true? 1. Frequency of the vibration of a particle is defined as number of vibrations completed by the particle in one second. 2. Wave motion is the sort of disturbance which travels through the medium. 3. Velocity of sound in dry air is grater than the velocity of sound in moist air 4. Seismic waves are examples of mechanical waves

asked Oct 30, 2017 by priyanka.c

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The pitch of a wave depends upon its

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The frequency of a sound wave

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An object of mass 30 kg displaces a liquid that weights 300 N when placed inside the liquid. Will the object float or sink?

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Submarines are built in accordance with

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If the speed of an object doubles then its kinetic energy

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Two people A and B carry some load from the road to the roof of the bus. A takes 1 min and B takes 2 minutes to do the same job. Who has done more work A or B?

asked Oct 30, 2017 by priyanka.c

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A body covers a distance of x meters along a circular path. The ration of the distance to that of displacement is

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What causes the change in mechanical energy to thermal energy?

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Newton's third law is also called as

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The total amount of kinetic and potential energy of a system is called

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An object falls off a height of 3m does a work of 147 Joules. Then the mass of the box is

asked Oct 30, 2017 by priyanka.c

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An object rolling down an inclined plane with a velocity of xm/s, then its acceleration is

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Which of the following does not require direction

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The kinetic energy of a substance is due to the _______ of the atoms contained in it.

asked Oct 30, 2017 by priyanka.c

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Read the following passage and answer the question given below A transvers wave motion is that wave motion in which individual particles of the medium execute simple harmonic motion about their mean position in a direction perpendicular to the direction of propagation of wave motion. A transverse wave travels through the medium in the form of crests and troughs. The distance between two consecutive crests or two consecutive trough is called wavelength of the wave. It is represented by λ. A longitudinal wave motion is that wave motion in which the individual particles of the medium execute simple harmonic motion about their mean position along the same direction, along which the wave is propagated. A longitudinal wave travels in the form of compressions and rarefactions. The distance between two compressions or rarefactions is the wavelength of the wave. QUESTION : Transverse waves cannot be produced in liquids and gases why?

asked Oct 30, 2017 by priyanka.c

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Read the following passage and answer the question given below A transvers wave motion is that wave motion in which individual particles of the medium execute simple harmonic motion about their mean position in a direction perpendicular to the direction of propagation of wave motion. A transverse wave travels through the medium in the form of crests and troughs. The distance between two consecutive crests or two consecutive trough is called wavelength of the wave. It is represented by λ. A longitudinal wave motion is that wave motion in which the individual particles of the medium execute simple harmonic motion about their mean position along the same direction, along which the wave is propagated. A longitudinal wave travels in the form of compressions and rarefactions. The distance between two compressions or rarefactions is the wavelength of the wave. QUESTION : Waves on strings are always

asked Oct 30, 2017 by priyanka.c

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It is painful to walk bare footed on a road converted with pebbles because

asked Oct 30, 2017 by priyanka.c

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