Physics, 01.05.2021 08:50 kailahgranger
1. Two masses are attracted to each other by a force of 3.4 X 10-2 N. What would be the force of attraction if the masses of each were doubled and the distance between them kept constant?
2. Referring to problem 1, what would be the force if one mass was doubled, the other mass tripled and the distance between them 1/2 the original separation distance?
3. Planet Z has a radius 10 times that of the earth and a mass that is 20 times as much. How much would a 160 lb man on the earth weigh on planet Z?
4. What would be the mass of the man in problem 3; a.) on the earth b.) on planet Z?
5. How is the acceleration due to gravity affected if the distance from the center of gravity is; a.) doubled? b.) tripled? c.) 1/4?
6. Calculate the acceleration due to gravity at an altitude of 6.37 X 106 m above the earth's surface.
7. How much would a 30 kg mass weigh at the earth's surface?
8. How much would the 30 kg mass in problem 7 weigh at an altitude of 6.37 X 106m above the earth's surface?
Answers: 2
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Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .
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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*
Answers: 1
1. Two masses are attracted to each other by a force of 3.4 X 10-2 N. What would be the force of att...
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