Evaluate the success of demand side management techniques in decreasing the demand for power plants. Could the method have worked better?
What will be an ideal response?
There are two sides in a trade—demand and supply. On the supply side, you
could lower energy use by imposing cuts. On the demand side, you might begin a program
that helps homeowners replace incandescent lights by compact fluorescents. You might
create incentives to replace old refrigerators, etc. This has had limited success, and probably
will have even less of a future in a deregulated energy supply system.
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RC Circuits: For the circuit shown in the figure, C = 12 µF and R = 8.5 M?. Initially the switch S is open with the capacitor charged to a voltage of 80 V. The switch is then closed at time t = 0.00 s. What is the charge on the capacitor, when the current in the circuit is 3.3 µA?
A. 350 µC B. 340 µC C. 480 µC D. 620 µC E. 700 µC
The angular size of an object depends on which two quantities?
A) The object's actual size and its mass B) The object's distance from us and its brightness C) The object's actual size and its distance from us D) The object's brightness and its mass
Air is flowing through a rocket nozzle. Inside the rocket the air has a density of 5.25 kg/m3 and a speed of 1.20 m/s
The interior diameter of the rocket is 15.0 cm. At the nozzle exit, the diameter is 2.50 cm and the density is 1.29 kg/m3. What is the speed of the air when it leaves the nozzle? A) 176 m/s B) 123 m/s C) 88.0 m/s D) 45.7 m/s E) 29.3 m/s
Which of the following statements about neutrinos is not true?
A) About a thousand trillion neutrinos are passing through your body every second. B) Neutrinos are created as a by-product of the proton-proton chain. C) Neutrinos have no electrical charge. D) Neutrinos have a tendency to pass through just about anything without interactions, making them very difficult to detect. E) The mass of a neutrino is 30 percent of the mass of an electron.