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1. A child pulls a toy car weighing 0.20 kg across a smooth floor by means of a string attached to it. If the string makes an angle of 60° to the floor and the child pulls with a f
Explain the Density Density is a measure of how densely packed matter is. One standard brick weighs more than the same size piece of Styrofoam but less than the same size bric
The process of apparent change in frequency (or wavelength) of the light because of relative motion among the source of light and the observer is known as Doppler's effect.
Write the mathematical relation for the resistivity of a material in terms of relaxation time, number density and mass and charge of charge carriers in it. Describe, using this rel
Newton's Corpuscular Theory: Newton's corpuscular theory of light states that 1. Light is emitted form of tiny particles is known as corpuscles. 2. The corpuscles travel
A boy throws a ball of mass 20 kg vertically upwards.It raises to a maximum height of 100 m.At what height will the kinetic energy be reduced to 70%?
Question: The resistance-per-length of the wire is wire's resistivity. Answer: Resistivity has units of ohms per meter therefore as regards wire it is certainly natur
Magnetism: Everyone has seen and handled a magnet in the form of a straight or horseshoe-shaped bar of steel or steel-alloy. The magnet was originally a piece of steel befor
explain the pitch of sound and also explain is the ghosts come in the category of matter? is the sound is the form of wave? explain sound,intensity,types,loudness of sound, quality
In the figure below the closed surfaces A and B appear as closed curves. Find the flux through closed surface B.
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