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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?
Describe typical applications of this type of sensor.
consider a cylinder transistor diameter 0.4 cm and length 0.5 cm that dissipated 0.2w power onto 30c transistor1
Plot the engineering stress-strain curve. Determine i. Young's modulus, ii. the 0.2% offset yield strength, iii. the tensile strength, iv. the percent elongation, and v. the percent reduction of area.
5 kg of air initially at 10oc and 100 kpa is in piston-cylinder device. initially the piston is resting on a set of
1. (a) In your own words describe briefly the phenomenon of luminescence. (b) What is the distinction between fluores- cence and phosphorescence?
consider entropy balance equation for human engines. humans loose heat at the rate of 80 w from the body which is
At an instant in time during the discharge of a bat- tery, liquid paraffin occupies an annular region of outer radius ro = 19 mm around the battery, which is generating Eg = 1 W of thermal energy. Deter- mine the surface temperature of the battery.
a closed rigid container has a volume of 85 liters. the system contains steam at 2 bar and has a quality of 0.9.
Bar AB has a cross-sectional area of 1200 mm2 and is made of a steel that is assumed to be elastoplastic with E = 200 GPa and σY = 250 MPa.
Estimate the power dissipated by a single chip if it is operating at 50% of the critical heat flux. What is the corresponding value of the chip temperature? Compute and plot the chip temperature as a function of surface heat flux for 0.25 qs"/q"max..
An insulated, rigid tank is divided into two equal parts by a partition. Initially, one part contains 6.06 kmol of an ideal gas at 155 kPa and 30C, and the other side is evacuated. The partition is now removed, and the gas fills the entire tank. Dete..
the compression ratio of an ideal dual cycle is 14. air is at 100 kpa and 300 k at the beginning of the compression
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