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Hot water is provided to a house by an electric water heater which uses a 60L tank. The electric heater is rated for a 1.6kW. The hot water tank is completely full with water at 80°C when someone starts a shower. The shower faucet mixes cold water at 20°C and a flow rate of 0.06kg/s with hot water at an unknown flow rate from the water heater. After an 8min shower period, the water in the hot water heater has dropped to a temperature of 60°C. The heater ran continuously during the shower period and drew in cold water at 20°C at the same rate as hot water left it. What was the mass of hot water withdrawn from the tank?
one means of cooling in a hot dry climate is to use evaporative cooling where outside air is drawn into a unit where
find: a) the pitch diameter of the pinion. b) the pitch diameter of the gear. c) the output torque of the gear. d) the minimum length of the key used to attach the gear?
While visiting San Diego, you find an old milk pitcher at the thrift shop and suspect that it is valuable because the metal is really soft, like most noble metals. You know that silver and platinum look similar, but have way different thermal conduct..
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a number of small solid bodies are floating on the surface of a liquid. what is the effect of surface tension on two
Benzene, p= 54 lb/ft^3 at 100 F is pumped at a rate of 40 gpm. The reservoir is open to atmosphere and below the pump centreline by 4 ft. The discharge line is 10 ft above the pump centreline. The gage at discharge reads 50 psig. The discharge line i..
a machine part of mass 1.95 kg vibrates in a viscous medium. determine the damping coefficient when a harmonic exciting
Considering the flow of a uniform stream of speed V in the x-direction, a source of strength Q at (-1,0) and sink of strength Q at (1,0). Find the velocity potential and the stagnation points
airplane takeoff from an aircraft carrier is assisted by a steam driven pistoncylinder device with an average pressure
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for a crystal with a cubic structure sketch its unit cells showing the following crystallographic directionsa 011 b 212
the volume of 1.5 kg of helium in a piston-cylinder device is initially 9 m3. now the helium is compressed to 5 m3
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