Refraction of Light — Physics STD 10 — Question

A mixture of radioactive substance gives off three types of radiation name the radiation which when becomes neutral, become the atom of rare gas.

Define one ohm.

Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
An arrow shot out of a bow.

A type of single pulley is very often used as a machine even though it does not give any gain in mechanical advantage. For what purpose is such a pulley used?

Define one kilo-calorie of heat.

Give one example when:
Heat energy changes to kinetic energy.

What is meant by the term 'center of gravity of a body'?

For what purpose are the transformers used? Can they be used with a direct current source?

Why is a loud sound heard at resonance?

What happens to the atomic number of an element when it emit a beta particle.