A person pushing a wall hard is liable to fall back. Give reason.

The weight of a person in Jupiter is 2.5 times as that on Earth. Give reasons.

The weight of a person in moon is only 1/6 of that on the Earth. Give reason.

A man pushes a wall and fails to displace it.He does

Thermos bottle or Dewer flask consists of a double walled glass vessel with inner and outer walls coated with silver. Give reason.

A soure of sound of frequency 165 Hz generates sound waves which get fully reflected from a wall . A person standing at the wall starts moving away from the wall. The minimum distance of the point from the wall at which the person hears maximum sound is (velcoity of sound = 330 ms^(-1) )

In Physics, reading a book and pushing a wall are considered to be work.

In a dark room, a parallel beam of light falls on a plane mirror and another parallel beam of light falls on a white wall. The light reflected by the mirror can be seen only in a certain direction, but the reflected light from the wall can be seen from anywhere. Give reason.

Assertion: Pulling a lawn roller is easier than pushing it. Reason:Pushing increases the apparent weight and hence the force of friction.

If a person wearing a narrow-heeled shoe accidentally steps on you, it will hurt more in comparison to a shoe with a wider base. Give reason.

Can two persons hear each other on moon's surface ? Give reason to support your answer.