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An electric locomotive together with its train has a mass of 200 tonne. The average tractive resistance to motion is 55 N/tonne while starting from rest up a gradient of 1 in 100. Calculate time taken to travel the first 1 km if the average tractive effort exerted by the locomotive is 35 kN.
determine the maximum acceleration that can be achieved by the car without having the front wheels a leave the track or
a system has an initial volume of 10 ft3 and expands to a final volume of 20 ft3. the initial pressure is 14.7 psi.
refrigerant-134a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at
a heat engine is operating on a carnot cycle and has a thermal efficiency of 55. the waste heat from this engine is
suppose 2.00 m3 of air which is considered an ideal gas is initially at a pressure of 101.3 kpa and a temperature of
the 2-kg collar is released from rest at A and travels along the smooth vertical guide. determine the speed of the collar when it reaches position B.Also ,find the normal force exerted on the collar at this position.the spring has an unstrectched ..
a 0.400 kg ball has a volume 1.48 x 10-4 m3. when dropped into water after a short time the sphere is observed to
consider a viscoelastic polymer rod that is stretched from 100 mm to 165 mm by a stress of 3.35 mpa. while being held
a closed system undergoes a process in which there is a heat transfer of 100 kj. if the initial specific internal
A state runs a lottery in which 6 numbers are randomly selected from 40, without replacement. A player chooses 6 numbers before the state's sample is selected.
your job is to create a design of Rankine cycle that create the most possible power from this heat source . you may use any working fluid for which you can find the properties , assume the turbines 92% efficient and pumps 85%
air at -55 f 4 psia and m2.5 enters a constant area isentropic process and leaves the isentropic process at m0.2
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