Physics, 24.03.2020 00:28 sparky1234
A sound wave with a wavelength of 2.5 m travels 660 m in 2s. Calculate the frequency of the wave.
Answers: 1
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What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane
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Two cans on a sunny window one black and the other white construct and explanation of the effect of sun will have on both cans over a two hour period?
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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?
Answers: 2
A sound wave with a wavelength of 2.5 m travels 660 m in 2s. Calculate the frequency of the wave....
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