Physics, 08.11.2020 04:00 lanaiheart7
1. A weight lifter lifts 100 kg of mass from the floor to a position above her head, 2.2 meters off the floor.
a. How much potential energy does the mass now have with respect to the floor?
PE
Answers: 2
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X-ray crystallography is used to see the structure of molecules. scientists have used the technique to find the structure of cholesterol an important biological molecules knowledge of a structure of cholesterol is because it may affect?
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Athin electrical heater is inserted between a long circular rod and a concentric tube with inner and outer radii of 20 and 40 mm. the rod (a) has a thermal conductivity of ka = 0.15 w/(m*k), while the tube (b) has a thermal conductivity of kb = 0.8 w/(m*k) and its outer surface is subjected to convection with a fluid of temperature t= -15°c and heat transfer coefficient 60 w/(m2 *k). the thermal contact resistance between the cylinder surfaces and the heater is negligible. (a) determine the electrical power per unit length of the cylinders (w/m) that is required to maintain the outer surface of cylinder b at 15°c. (b) what is the temperature at the center of cylinder a?
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Why does a smaller car get better gas mileage than a bigger one?
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1. A weight lifter lifts 100 kg of mass from the floor to a position above her head, 2.2 meters off...
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