What is the gravity force between two objects with mass of 100,000 kg and 200,000 kg apart from each other at a distance of 0.1 km (in N, G = 6.67×10−11N (m/kg)2) ? can anyone walk me through this and help me?
a. 2.668×106
b. 6700
c. 2668
d. 26.68×108
e. 266.8×10−6

Achild throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. the ball leaves her hand 1.00 m above the ground. how long is the ball in flight before it hits the ground?

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.