The bases of cooking vessels are painted ___ in order to absorb more heat.

Photoelectric effect was discovered by

Which instrument measures the intensity of earthquake shocks?

Decibel is used to measure______?

The molecular weight of water is___?

When X-rays are produced?

Temperature of the substance denotes ____ energy of its particles.

Ice floats on water because its density is ___ than that of water.

Ice floats on water because its density is ___ than that of water.

Who was the inventor of positron?

The normal value of acceleration due to gravity is___?