Explanation

An anemometer is an instrument that measures wind speed.

This type of anemometer has a spinning wheel.

Additional Information:

A hygrometer is an instrument used to measure humidity

A salinometer is used to measure the salinity

A bolometer is used to measure the power of incident electromagnetic radiation

A barometer is used to measure air pressure in certain environment.

Explanation

Explanation

When two bodies are moving in opposite directions, their velocities are added to find the relative velocity.

Let's say the velocities of the two bodies are v1 and v2.

Relative velocity = v1 + v2

Since both velocities are non-zero and in opposite directions, the relative velocity will be greater than the absolute velocity of either body.

So, the statement "Relative velocity > Absolute velocity" is true.

Explanation

Kepler's Third Law of Planetary Motion states:

T² = (4π²/G * (M₁ + M₂)) * a³

Where:

T = Orbital Period

a = Semi-major Axis

G = Gravitational Constant

M₁ and M₂ = Masses of the two bodies (e.g., planet and star)

This law shows that the square of the orbital period (T) is proportional to the cube of the semi-major axis (a).

Explanation

When a satellite orbits close to the Earth's surface, it must travel faster to avoid falling towards the Earth due to gravity. This means its speed is maximum.

Since kinetic energy (KE) is proportional to the square of the speed (v), the kinetic energy will also be maximum:

KE = (1/2)mv^2

where m is the mass of the satellite.

So, when a satellite orbits close to the Earth's surface, its kinetic energy will be maximum.