Explanation

Hydroelectric power is a renewable, cost-effective, and environmentally friendly source of energy.

It utilizes the flow of water to generate electricity, with minimal greenhouse gas emissions once the dam infrastructure is built.

Explanation

Always select the maximum range of the current meter while measuring the current of an unknown wire.

This prevents potential damage to the meter and ensures accurate measurements if the current is unexpectedly high.

Explanation

Number of moons in the planets

Saturn: 83

Jupiter: 92

Uranus: 27

Neptune: 14

Mars: 2

Earth: 1

Venus: 0

Mercury: 0

Explanation

A nanometer (nm) is equal to one-billionth of a meter, written in scientific notation as 1 × 10⁻⁹ m or 0.000000001 meters.

It is commonly used to measure objects at the atomic and molecular scale.

Explanation

Explanation

Explanation

Explanation

Explanation

When a proton and anti-proton annihilate, the energy release is equal to the sum of their rest mass energies.

The rest mass energy of a proton (or anti-proton) is approximately:

E = mc²

= (1.67 × 10⁻²⁷ kg) × (3 × 10⁸ m/s)²

≈ 1.5 × 10⁻¹⁰ J

Since both the proton and anti-proton annihilate, the total energy release is:

E_total = 2 × 1.5 × 10⁻¹⁰ J

≈ 3 × 10⁻¹⁰ J

Explanation