Sound — Physics STD 10 — Question

Define the term 'specific heat capacity' and state its unit.

What are mechanical waves?

Name the quality which is measured in kW.

How does the resistivity of a semiconductor depend on temperature?

Write down the approximate temperature at which the water boils in a pressure cooker.

Which type of current does a generator with commutator produce?

A boy of mass m climbs up a staircase of vertical height h. What is the work done by the boy against the force of gravity? What would have been the work done if he uses a lift in climbing the same vertical height?

In the following case write yes, if the work is being done and no if no work is being done.
A man trying to push a wall.

State and define the S.I. unit of power.

Explain, why quartz prism is required for obtaining the spectrum of ultra-violet light?