Asatellite is in a circular orbit about the earth at a distance of one earth radius above the surface. what is the speed of the satellite? (the radius of the earth is 6.4 × 106 m, and g = 6.67 × 10−11 n⋅m 2 /kg2 .)

The speed of the satellite is 25.57×10⁻⁵ m/s

Explanation:

Satellite: These are bodies which move in orbit around the moon or planets. Some of them are are natural, others are artificial, i.e man-made.

The speed of a satellite in its orbit is represented by the expression below.

v = √(rg) Equation 1

Where v = speed or velocity of the satellite, r = radius of the earth, g = acceleration due to gravity of the earth

Given: r = 6.67×10⁻¹¹ m

Constant: g = 9.8 m/s²

Substituting these values into equation 1,

v = √(9.8×6.67×10⁻¹¹ )

v = √(65.366×10⁻¹¹)

v = 25.57×10⁻⁵ m/s

Thus the speed of the satellite is 25.57×10⁻⁵ m/s

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me