Explanation

Albert Einstein was a German physicist (not a physician) who gave the famous equation:

$$E = mc^2$$

Where:

• $E$ = Energy

• $m$ = Mass

• $c$ = Speed of light in a vacuum

Explanation

X-rays are a type of electromagnetic radiation, like light or radio waves.

Alpha (α) and beta (β) rays are particles, not electromagnetic waves.

Explanation

Enthalpy is a form of energy, so its SI unit is Joule (J).

1 calorie = 4.184 joules.

But Joule is the standard unit in thermodynamics.

Explanation

The speed of sound is maximum in solids because particles are tightly packed, allowing faster vibration transfer.

In iron, sound travels around 5120 m/s, much faster than in air (343 m/s) or water (1482 m/s).

Explanation

Explanation

Explanation

The Equator is an imaginary line that runs around the middle of the Earth.

It divides the Earth into the Northern Hemisphere and the Southern Hemisphere, separating the North and South Poles.

Explanation

Transverse waves involve oscillations perpendicular to the direction of travel and can be polarized, while they do not necessarily require a medium to travel (e.g., light waves).

Explanation

Explanation