Explanation

Petroleum has the highest energy density among fossil fuels, making it the richest source of energy.

It is widely used in transportation, industry, and power generation due to its high calorific value.

Explanation

Explanation

The Earth rotates at 15° per hour.

It spins on its axis once every 24 hours.

At the equator, the Earth's spin is about 1,000 miles per hour (1,600 km per hour).

The Earth rotates counterclockwise, from west to east.

 The Earth also moves around the Sun, which is called its orbit.

It takes the Earth 365 1/4 days to complete one orbit around the Sun.

Explanation

 The abbreviation EMF stands for electromotive force,

It is the electrical potential that drives the flow of electric charge in a circuit

 It's also sometimes referred to as voltage. 

Explanation

Dispersion occurs when white light passes through water droplets in the atmosphere, causing the light to spread out into its component colors (spectrum).

Each color of light bends by a different amount due to their different wavelengths, resulting in the formation of a rainbow.

Explanation

The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter

. Sometimes an earthquake has foreshocks.

Explanation

Since P ∝ 1/V, it means P × V = constant.

So, 10 × 25 = P × 20

Solving:

250 = 20P ⇒ P = 12.5 N/m²

Explanation

Fission is the process of splitting an atomic nucleus into smaller nuclei, releasing a large amount of energy.

It is used in nuclear power plants and atomic bombs.

Explanation

On November 3, 1957, the Soviet Union sent a dog named Laika into space aboard Sputnik 2.

Laika became the first living being to orbit the Earth, though tragically, she did not survive the mission.

Explanation

Self-Contained Breathing Apparatus (SCBA) provides firefighters with a portable air supply.

It uses lightweight materials to ensure ease of movement and safety in hazardous environments.