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 speed of sound in water is approximately 1500 m/s, which is slower than in most solid materials but faster than in air.

This speed can vary slightly depending on factors like temperature and salinity.

Explanation

• Venus and Mercury are the only planets in the solar system that do not have any natural satellites or moons.
• Likely due to their proximity to the Sun and gravitational influences.

Explanation

Nuclear energy is produced in a nuclear power plant through nuclear fission, where atomic nuclei split to release a large amount of energy.

This energy is then used to generate electricity by heating water to produce steam, which drives turbines.

Explanation

Terrestrial planets are rocky planets, including Earth, Mars, Venus, and Mercury.

These planets have solid, rocky surfaces.

Unlike gas giants which are composed mainly of gases.