A water is pumped at a rate of 24 cm3/s through a 0.50-cm radius pipe on the main floor of a house to a 0.35-cm radius pipe in a solar hot water collector 4 m higher on the roof. If the pressure in the pipe on the roof is 1.2 x 105 Pa, what is the pressure in the larger pipe on the floor?
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- A friend asks you how much pressure is in your car tires. Unfortunately, you have misplaced your gauge but confident in your knowledge of physics you tell your friend “I can figure it out”. From the owner’s manual you find that the car’s mass is 1450 kg and that the tire manufacturer recommends 32 psi. Assuming that each tire supports one-fourth of the weight of the car, you use a ruler to find that the tires are 15 cm wide and the flattened segment of the tire in contact with the road is 16 cm long. What answer do you give your friend? Express your answers in pounds per square inch (psi)A 4.5-kg, three legged stool supports a 65-kg person. If each leg of the stool has a cross-sectional diameter of 2.2 cm and the weight of the person is evenly distributed, determine the pressure exerted on the floor by each leg. PaB9
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