EASY
JEE Main
IMPORTANT
Earn 100
When the skeleton of an elephant and the skeleton of a mouse are prepared in the same size, the bones of the elephant are shown thicker than those of the mouse. Explain why the bones of an elephant are thicker than proportionate. (The bones are expected to withstand the stress due to the weight of the animal).
Important Questions on Some Mechanical Properties of Matter
EASY
JEE Main
IMPORTANT
The yield point of a typical solid is about . Suppose you are lying horizontally and two persons are pulling your hands and two persons are pulling your legs, along your own length. How much will be the increase in your length, if the strain is ? Do you think your yield point is or much less than that?
EASY
JEE Main
IMPORTANT
When rubber sheets are used in shock absorbers, what happens to the energy of vibration?
EASY
JEE Main
IMPORTANT
If a compressed spring is dissolved in acid, what happens to the elastic potential energy of the spring?
EASY
JEE Main
IMPORTANT
A steel blade placed gently on the surface of water floats on it. If the same blade is kept well inside the water, it sinks. Explain.
EASY
JEE Main
IMPORTANT
When some wax is rubbed on a cloth, it becomes waterproof. Explain.
EASY
JEE Main
IMPORTANT
The contact angle between pure water and pure silver is . If a capillary tube made of silver is dipped at one end in pure water, will the water rise in the capillary?
EASY
JEE Main
IMPORTANT
It is said that a liquid rises or is depressed in a capillary due to the surface tension. If a liquid neither rises nor depresses in a capillary, can we conclude that the surface tension of the liquid is zero?
EASY
JEE Main
IMPORTANT
The contact angle between water and glass is . When water is poured in a glass to the maximum of its capacity, the water surface is convex upward. The angle of contact in such situation is more than . Explain.
