Questions

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

Momentum is measured as the product of :

Find the power of a convex lens if the image formed is at a distance of 10 cm from the lens when the object is placed on the other side of the lens at 40 cm from the optical centre?

Sound is a form of ____________ which produces a sensation of hearing in our ears.

A body of mass 18 kg is moving with a velocity of 6 m/s, find its momentum.

Azolla increases soil fertility for ....

Which of the following planets of our solar system has least mass?

Soil contains decayed remains of living organisms. This is called __________.