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Physics, 22.06.2019 08:00
If a balloon is taken outside on a very cold day, what will occur?
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Physics, 22.06.2019 22:30
Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation
Answers: 3
Physics, 23.06.2019 05:30
Oxygen gas enters well-insulated diffuser at 25 lbf/in.2, 420r, with a velocity of 860 ft/s through a flow area of 1.6 in.^2. at the exit, the flow area is 12 times the inlet area, and the velocity is 19 ft/s. the potential energy change from inlet to exit is negligible. assuming ideal gas behavior for the oxygen and steady-state operation of the diffuser, determine the following: (a) the exit temperature, in r(b) the exit pressure, in lbf/in.^2 (c) the mass flow rate, in lb/s
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Physics, 23.06.2019 21:00
Arod made of cobalt with a mass of 0.80 kg is heated to 800°c, then dropped into 6.00 kg of water at 10°c. what is the total change in entropy (in j/k) of the rod-water system, assuming no energy is lost by heat from this system to the surroundings
Answers: 3
Aball is projected upward at time t = 0.0 s, from a point on a roof 60 m above the ground. the ball...
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