Explanation

• Communication satellites are used for telecommunication.
• Including telephone communication, internet connectivity, and television broadcasting, enabling global communication networks.

Explanation

Explanation

Projectile motion involves:

• Horizontal motion (x-axis)

• Vertical motion (y-axis)

These two motions occur simultaneously but are independent of each other.

Therefore, projectile motion is considered two-dimensional.

Explanation

To convert radians to degrees, you multiply the number of radians by 180/π. 100 radians multiplied by 180/π is approximately 5729.58 degrees, which rounds to 5730 degrees. 

Explanation

Sound needs a medium (like air, water, or solids) to travel because it moves by vibrating particles.

In a vacuum, there are no particles to vibrate, so sound cannot travel and no sound can be heard.

Explanation

Explanation

According to Kepler's third law:

The square of the time period (T²) of a planet.

The Sun is directly proportional to the cube of the semi-major axis (R³) of its orbit.

Mathematically, this can be expressed as:

T² ∝ R³

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.

Explanation

Explanation