As according to Kepler 's law
T =(4π²r³/ Gm)^1/2
here r= distance from earth center to satellite = 6400km = 6400000m
G = earth's gravitational constant= 6.67×10^-11
m = mass of earth= 5.98 ×10^24
so T =[ { 4× (3.1416)²×(6400000)³}/ {(6.67×10^-11)×( 5.98 ×10^24)} ]^1/2
T= 5133 sec
Answer:
B
Explaination:
Radiation refers to the emission of energy in rays or waves. Heat moves through space as energy waves.
Answer: 1687.5 N
Explanation:
From the second law of motion given by Newton, Force is the rate change of momentum.

Mass of the baseball, m = 0.15 kg
Initial velocity,
(negative because direction of initial velocity is opposite to the final velocity)
Final velocity, 
The duration of collision, 
Force, 
Hence, the value of force is 1687.5 N.
The resultant<span> is the vector sum of 2 or more vectors. It is the conclusion of adding 2 or more vectors together. If </span>displacement <span>vectors A, B, and C are added together, the result will be vector R.</span>