Questions

Metamorphism is the change of minerals or geologic texture in pre-existing rocks, without the protolith melting into liquid magma. The change occurs primarily due to heat, pressure, and the introduction of chemically active fluids.

The parent rock must be in solid form. Tons of pressure must be applied for metamorphism to happen. The process must take place underground.

River.

It always runs  or flows but never walks.

It will sound like murmuring but never talks.

It has bed but never sleeps.

It has mouth but never eats.

Megahertz is used to measure wave frequencies, as well as the speed of microprocessors. One MHz represents one million cycles per second. The speed of microprocessors, called the clock speed.

The motto of the Supreme Court of India is "Yato Dharmastato Jayah" i.e, anytime truth wins. It was done in 1950.