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a) A bar-shaped piece of silicon at room temperature is one inch inlength and has a 100 μm2 cross-sectional area (i.e. 10x10μm). It is doped with phosphorous to a concentration of1017/cm3. Find the electrical current through the bar when avoltage of 10 V is applied across the one-inch dimension.
b) How long does it take an average electron to drift from one endof the bar to the other?
c) Suppose now that we operate in the high-field regime and apply avoltage of 250 kV. What is the electrical current and how long doesit take an average electron to drift from one end of the bar to the other?
A 800 kg car is travelling forwards at + 25 m s?1 along a level road. What is the acceleration during skidding
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Using the data calculate the average speed of blood flow in the major arteries of the body which have a total cross-sectional area of about 2.0 cm2.
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While driving on the freeway at 110 km/h, you pass a truck whose total length you estimate at 25 m. A. If it takes you, in the driver's seat, 6.0s to pass from the rear of the truck to its front, what is the truck's speed relative to the road? ..
A 77.5 kg bobsled is pushed along a hor- izontal surface by two athletes. After the bobsled is pushed a distance of 5.0 starting from rest, Find the magnitude of the net force on the bobsled
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