Measurement — PHYSICS STD 9 — Question

State briefly the functioning of a biogas power-source.

A person in front of a spherical mirror finds his image having a very small head, a fat body and legs of normal size. What are the shapes of three parts of the mirror?

State the energy transformation in the following:
electricity is obtained from solar energy.

Name the physical entity used for quantifying the motion of a body.

Which is bigger: 1 C or magnitude of the charge on an electron?

Give an example of an accelerated body, moving with a uniform speed.

Out of metals, liquids, and gases:
Which one is the best conductor of heat?

What can you say about the nature of motion of a body if its displacement-time graph is A straight line inclined to the time axis with an acute angle?

How does the speed of sound in air vary with temperature?