Work and Energy — Science STD 9 — Question

What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances?

How many watts equal one horse power?

What is meant by saying that metals are malleable and ductile?

Name one pair of substances whose mixture can be separated completely by distillation.

On what factors does the kinetic energy of a body depend?

What are the two ways in which the physical states of matter can be changed?

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

What is meant by supersonic speed?

Name the property of earth which is responsible for extremely small acceleration being produced in it as a result of attraction by other small objects.

Name the device or machines which convert:
Light energy into heat energy.