Physics, 15.01.2020 19:31, joelpimentel
A4000 kg elevator rises from the basement to the top of a100-m tall building. which of the following is closest to the network done on the elevator as it rises through the middle 20m of itstrip at a constant velocity? use g=10m/s^2.
a.) 800,000 j
b.) -800,000j
c.) 80,000 j
d.) -80,000j
e.) 0 j
Answers: 1
Physics, 21.06.2019 19:00, paatnguyyen
Adelivery truck leaves a warehouse and travels 2.60 km north. the truck makes a left turn and travels 1.25 km west before making another right turn to travel 1.40 km north to arrive at its destination. what is the magnitude and direction of the truck's displacement from the warehouse?
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Physics, 22.06.2019 16:50, lizzepacheco
Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.
Answers: 2
A4000 kg elevator rises from the basement to the top of a100-m tall building. which of the following...
Mathematics, 06.04.2020 23:33