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A scooter is to be designed to roll down a 2 percent slope at a constant speed. Assuming that the coefficient of kinetic friction between the 25-mm-diameter axles and the bearings is 0.10, determine the required diameter of the wheels. Neglect the rolling resistance between the wheels and the ground.
Water is stored in a water tower at an elevation of 1804 m above sea level. The foundation of your apartment building is at an elevation of 437 m above sea level and you live on the 9th floor, with each floor having a height of 3.3 m.
Suppose you are appointed as a material engineer at an industry company. The company produces, cutting tools, various car and truck spare parts using different steels. The steels as raw materials to make the parts. All steels are round bars with 50 m..
an ideal gas at 100 kpa and 15 degrees c enters a steady-flow compressor. the gas is compressed to 600 kpa and 10 of
A vacuum gage connected to a chamber reads 35 kPa at a location where the atmospheric pressure is 92 kPa. Determine the absolute pressure in the chamber.
If a person and a wheelchair have a mombined weight of 185 lb how much ideal effort force is required to travel up the ramp? Can you just explain to me what equation I need for this?
0.25 kg of red-hot 700 c coals are taken from the fireplace and left in the middle of a room. the room is 3 m x 4 m x
An adiabatic turbine has steam flowing steadily through it. The inlet conditions of the steam are P1=6 MPa, T1= 400C and v1=80 m/s, while the exit conditions are P2= 40kPa, .9 quality x=.9, and v0= 50 m/s. The mass flow rate of the steam is m= 20kg/s..
A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. For steady -state operation, the air conditioner cycle requires a power input of 0.434kw and has a coefficient o..
a rigid tank contains 7.5 kg of saturated water mixture at 400 kpa. a valve at the bottom of the tank is now opened and
Calculate the torque on each of the two shafts,the power transmitted and the power lost in friction. U=0.3 what is the efficiency of the drive.
A piping system consists of 300 ft of 2-in pipe, a sudden expansion to 3-in pipe and then 75 ft of 3-in pipe. Water is flowing at 125 gal/min through the system. What is the pressure difference from one end of the pipe to the other?
the air in a room has a dry-bulb temperature of 22 c and a wet-bulb temperature of 16 c. assuming a pressure of 100 kpa
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