Physics, 04.02.2021 20:20 wwwcarolynzouowficz
A block of mass 25 kg slides up a frictionless
plane inclined at 7.7◦ with the horizontal under the influence of a force of 220 N acting parallel to the incline and up the incline. The acceleration of gravity is 9.8 m/s
What is the acceleration of the block?
Answer in units of m/s
Answers: 3
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, 22.06.2019 17:50
Convection occurs when thermal energy is transferred by the movement of
Answers: 1
Physics, 22.06.2019 18:00
Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.
Answers: 1
A block of mass 25 kg slides up a frictionless
plane inclined at 7.7◦ with the horizontal under the...
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