If two cars are 5 m apart, and one car has a mass of 2,565 kg and the other car has a mass of 4,264 kg, what is the gravitational force between the two
cars? Newton's law of gravitation is F.
Gm m2. The gravitational
gravity
constant G is 6.67 10-11 N. m²/kg2.
72

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*

How long will it take a car traveling of a constant speed of 45m/s to cover the distance of a 2.5km?