Physics, 14.09.2019 03:30 joyelewis58
As a science project, you drop a watermelon off the top of the empire state building. 320 m above the sidewalk. it so happens that superman flies by at the instant you release the watermelon. superman is headed straight down with a constant speed of 30 m/s. a) how much time passes before the watermelon has the same velocity? b) how fast is the watermelon going when it passes superman? c) how fast is the watermelon traveling when it hits the ground?
Answers: 1
Physics, 22.06.2019 14:20
4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)
Answers: 3
Physics, 23.06.2019 02:30
If frequency goes up, what happens to wavelength? does it get shorter or longer?
Answers: 2
Physics, 23.06.2019 08:00
You need to fill a basketball with air to play with it. you know that your pump expels air at a velocity of 6 cm/s. you know that the volume flow rate of air being pumped into the basketball is 103 cm^3/s. what is the diameter of your needle?
Answers: 1
Physics, 23.06.2019 08:30
List and describe three ways that humans can change ecosystems and three ways that humans can protect ecosystems.
Answers: 2
As a science project, you drop a watermelon off the top of the empire state building. 320 m above th...
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