Explanation

Centripetal force acts perpendicular to the direction of motion, so it does no work.

Work = Force × Displacement × cos(θ); since θ = 90°, cos(90°) = 0, so Work = 0.

Explanation

The Equator is the reference line for latitude and is defined as 0° latitude.

It dividing the Earth into the Northern and Southern Hemispheres.

Explanation

The Indian Space Research Organization (ISRO)  is the national space agency of India.

Explanation

Frequency is the number of cycles per unit time in a periodic wave.

It is measured in Hertz (Hz), where 1 Hz equals one cycle per second.

Explanation

Ray tracing is the method of following individual light rays from an object to the eye (or camera) to simulate how light interacts with surfaces (e.g., reflection, refraction).

It is widely used in computer graphics, optics, and physics to model light paths accurately.

Explanation

Iron magnets are temporary because they lose magnetism quickly when the external magnetic field is removed.

Steel magnets retain their magnetism for a long time, making them permanent magnets.

Explanation

The dielectric constant of water at around 18°C is approximately 80.

This high value makes water an excellent polar solvent for ionic and polar compounds.

Explanation

 When a ball is thrown vertically upwards, its velocity decreases as it rises due to gravity.

At the maximum height, the velocity becomes zero before it starts to fall back down.

Explanation

The product of frequency and time period is always equal to 1.

This is because frequency = 1/time period, so their product is 1.

Explanation

A geostationary satellite orbits the Earth at a speed that matches the Earth's rotation, staying fixed above the same point on the Earth's surface.

This allows it to maintain a constant position relative to the Earth.