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If 10% of your state would be covered with PV collectors, estimate the power produced in kWh/day per capita on average. If 10% of the people in your state had to drive 100 km/day to commute to work, how many kWh/day would that consume? Discuss the implications of these two estimates. How many collectors of 3 m × 10 m would be required to produce the energy for commuting with an all-electric car with 60% efficient batteries?
1 a flat bottomed test tube of 200mm height and 10mm internal diameter stands on its base. it initially contains a
1 water at 15 degrees celcius flows through a nozzle that contracts from a diameter of 10cm to 2cm. the exit speed is
A circular post, a rectangular post, and a post of cruciform cross section are each compressed by loads that produce a resultant force P acting at the edge of the cross section (see figure). The diameter of the circular post and the depths of the ..
1 water flows through a 45 ft pipe with a 0.5 in diameter at a flow rate of 5 gpm. what facrtion of this pipe can be
The radio antenna on a car begins to vibrate wildly at 8 Hz when the car is driven at 45 mi/h over a rutted road that approximates a sine wave of amplitude 2 cm and wavelength λ= 2.5 m. The antenna diameter is 4 mm. Is the vibration due to the ro..
A turbine receives 10 kg/s of steam at a state of p1 = 5 bar, t1 = 400?c and exhausts to a pressure of p2 = 1.5 bar. The ambient temperature is t0 = 300c and the ambient pressure is p0 = 1 bar. What is the rate of work if isentropic efficiency is 75%..
Find the tension in the cable when the sub is (a) hanging above the water, and (b) once the sub is lowered into the sea water. When released from the cable, will the bell tend to sink or float?
A simplified model of a petroleum pump is shown in Fig. 1.99, where the rotary motion of the crank is converted to the reciprocating motion of the piston. Find the equivalent mass, meq of the system at location A.
a preheater involves the use of condensing steam at 100? on the inside of a bank of tubes to heat air that enters at 1
Solve the the transient thermal conduction problem constrained as shown in the following figure using ANSYS. Thermal conductivity (k) of the material is 5 W/m*K and the block is assumed to be infinitely long. Also, the density of the material is ..
Determine which should be the thrust bearing, and find the magnitudes and directions of the forces answer
an air compressor takes air in at the state of the surroundings 100 kpa 300 k. the air exits at 400 kpa 200degc at the
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