Physics, 29.02.2020 03:28, choiboiqg5755
A rock of mass m is dropped to the ground from a height h. A second rock, with mass 2m, is dropped from the same height. Ignoring air resistance, when the second rock strikes the ground, its kinetic energy is.1. Twice that of the first rock2. Four times that of the first rock3. The same as that of the first rock4. Half as much as that of the first rock5. Impossible to determine
Answers: 1
Physics, 22.06.2019 12:30, lmolder1329
Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.
Answers: 1
Physics, 22.06.2019 14:20, jeny89
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, 22.06.2019 20:00, cindy14772
Which is the most accurate name for the covalent compound p2o3?
Answers: 2
A rock of mass m is dropped to the ground from a height h. A second rock, with mass 2m, is dropped f...
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