Heat — PHYSICS STD 7 — Question

The correct statement is

Which of the following is a good sound absorber ?

The formula for calculating the volume of a cube is :

The upper standard point on Fahrenheit scale is :

The density of a substance is the ratio of its mass to

A vapour is a gaseous state of liquid :

Pitch is the effect produced in the ear due to sound of some particular :

Which of the following device is commonly used to measure the volume of liquids such as petrol or kerosene?

An observer puts ear on a railway line 500 m from a friend with a hammer. When his friend hits the railway line with the hammer, the observer hears two sounds. The sound is first heard through :

A ball falls down vertically. Its motion is