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Determine the work done in lifting a 250-lb refrigerator 4 ft vertically into a van. Alternatively, the refrigerator could be placed on a cart and rolled up a 10-ft-long ramp. What force, parallel to the ramp, is required to push the refrigerator along the ramp? (Neglect rolling resistance.)
when the three blocks are released from rest they accelerate with a magnitude of 0.660 ms2. block 1 has mass m block 2
calculate the percent energy distribution in a steam generator that goes into steam losses to flue gases refuse and
a 15-kg steel gas tank holds 300 l of liquid gasoline having a density of 800 kgm3. if the system is decelerated with 6
a hemisphere shell with mass m and radius r rests on a horizontal table. at the top of the shell there is a hole. the
a small sphere of reference-grade iron with a specific heat of 447 jkgk and a mass of 0.515 kg is suddenly immersed in
water flows from a storage tank through a horizontal 6-inch pipe cast iron and discharges water 20 degrees celsius into
a closed system undergoes a polytropic process according to pv1.25c. the initial temperature and pressure are 600 k and
the aerodynamic resistance to motion of a car is nearly proportional to the square of its velocity. additional friction
a 5 ft3 tank containing steam at 14.7 psia 1 quality is fitted with a relief valve. heat is transferred to the tank
1. a hydro-electric plant is used to convert the potential energy of the water behind the dam into electricity. the
r-410a at 120c 4 mpa is in an insulated tank and flow is now allowed out to a turbine with a backup pressure of 800
1 air at the inlet of a nozzle is at 500 kpa 42.2oc and a velocity of 87 ms. the nozzle exit pressure is at 132 kpa.
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