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Q1. Resolve the forward current If and voltage across at the 1k ohms load using practical and complex diode model. When rd=15 ohms and battery is 7V.
Q2. Radioactive decay of granite and other rocks in the Earth's interior provides sufficient energy to keep the interior molten, heat lava, and supply warmth to natural hot springs. This is due to the average release of about 0.030 J per kilogram each year. How many years are required for a chunk of thermally insulated granite to increase 340 °C in temperature (assume the specific heat of granite is 800 J/kg °C)?
A car is behind a truck going 25m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 1.0m/s2. He gauges that he has to cover the 20-m length of the truck, plus 10m clear room at the rear of..
A meter stick supported at the 50 cm mark has masses of 300 g & 200 g hanging from it at the 10-cm & 60-cm mark, respectively. Where should we hang a third, 400-g mass to keep the meter stick balanced?
Coefficient of kinetic friction between tires and road
A sample of animal bone unearthed at an archaeological site is found to hold 173 grams of carbon and the decay rate of 14-C in the sample is measured to be 8.10 Bq. How old is the bone.
If a 200 N force F1 is applied to the piston with the 4 cm diameter, Calculate the magnitude of the force F2 that can be resisted by the piston with the 10 cm diameter? Ignore the weights of the pistons.
From the shape of total energy vs. time plot, what can you conclude about the conservation of mechanical energy in your mass and spring system.
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
A solenoid is to be constructed that will have a resistance of 5.00 ohms and produce a magnetic field of 0.0400 T at its center when it carries a current of 4.00 A. The solenoid will be made of wire that is 0.500 mm in diameter and have a radius that..
A copper telephone wire has essentially no sag between poles 20.5 meters apart on a winter day while the temperature is -15.5° C. How much longer is the wire on the summer day when the temperature is 27.0° C.
What is the necessary metabolic power? Hint: You can model her power needs as the sum of the power to walk on level ground plus the power needed to raise her body by the appropriate amount. Express your answer to two significant figures and include t..
Two identical carts travel at 1m/s in opposite directions on a common horizontal surface. They collide head-on and are reported to rebound, each with the speed of 2m/s.
The diodes are oppositely oriented, so that when one diode is forward-biased, the other is back-biased. Which phrase best describes the current in the circuit.
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