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1. Determine the solar elevation at solar noon for winer solstice, equinox, and summer solstice for elevations 30, 40, and 50.
2. What is the angle of the solar radiation on a south facing solar collector for each of the nine cases.
3. If the solar collector is behind glass which absorbs 5% of normal incident radiation. Determine the percentage transmission for each of the nine cases.
the work on a system with a mass 100 lbm is known to be 10 btus. if there is no change in potential energy and the
air at 101.3 kpa absolute and 25 c is flowing at a velocity of 10 ms in a wind tunnel. a long cylinder having a
a jeep tows a 400kg block uip a 45deg incline. the coefficients of friction between the block and the ground are us0.6
a power unit has a power rating of 30 kw and supplies flow at a rate of 60 lpm, what is the maximum pressure this unit can withstand?
Three springs and a mass are attached to a rigid, weightless bar PQ. Find the equation of motion and the natural frequency of vibration of the system.
suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactlyseven months as
you have been assigned to investigate a traffic accident. the masses of car a and car b are 1400kg and 1000 kg
B) Determine the minimum amount of work [kJ ] required to reach this end state. C) If more than the minimum work is actually used, where does this extra energy go? That is what becomes of the extra energy?
a gas-turbine power plant operates on a simple brayton cycle with air as the working fluid. the air enters the turbine
a 1-m3 rigid tank initially contains air at 150 kpa 300 k. the tank is connected through a valve to a supply line at
The elevator E has a mass of 500kg, and the counterweight at A has a mass of 150Kg. if the motor supplies a constant force of 5KN on the cable at B, determine the speed of elevator when t= 3s, starting from rest neglect the mass of pulleys and cab..
a cylindrical storage tank with dimensions of 15 m height and 15 m inside diameter is used to store oil having a
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