Work and Energy — Science STD 9 — Question

Compare an electron, a proton and a neutron in respect of their relative masses and charges.

Name the quantity which is measured by the area occupied under the velocity-time graph.

Give the usual mane of the following:
Heat required to change the state of a substance without changing the temperature.

What happens to the loudness of a sound if its amplitude decrease?

If the weight of a body on the earth is 6 N, what will it be on the moon?

What is the condition for a force to do work on a body?

State any two properties for believing that aluminium is a metal.

How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.

Define one newton force.

A body goes round the sun with constant speed in a circular orbit. Is the motion uniform or accelerated?