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In the circuit shown in Fig, D 1 is a large-area, high-current diode whose reverse leakage is high and independent of applied voltage, while D 2 is a much smaller, low-current diode. At an ambient temperature of 20 ° C,resistor R 1 is adjusted to make V R1 =V 2 =520 mV. Subsequent measurement indicates that R 1 is 520 kΩ. What do you expect the voltages V R1 and V 2 to become at 0 ° C and at 40 ° C?
Suppose a 60-turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. The coil originally has an area of 0.270 m2. What is the direction of induced emf
A bicycle with a mass of 20 kg drives over a semi-circular of radius 18.2 meters. what is the radius of the hill in meters
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. determine the recoil velocity
A lens made of fused quartz (n = 1.46) has a focal length of +50cm when it is in air. What is the focal length when it is in oil
A crate of mass 12.5 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The pulling force is 100 N parallel to the incline, How much mechanical energy is lost due to friction
An empty elevator has a mass of 365.2 kg, and the people inside have a total mass of 172.1 kg. What is the net force on the elevator
You propose a new temperature scale with temperatures given in ?M. You define 0.0 ?M to be the normal melting point of mercury, What is the normal boiling point of water
An engine with reservoir temperatures of 387 K and 725 K operates at half the efficiency of a Carnot engine. If the hot reservoir supplies the engine 4670 J of heat energy during each cycle, how much net work does the engine do in a cycle?
A cat rides a merry-go-round while turning with uniform circular motion. At time t1 = 2.00 s, the cat's velocity is v1 = (3.50) + (4.00 m/s), find the magnitude of the cat's centripetal acceleration
Light from a sodium lamp (= 589 ) illuminates two narrow slits. What is the spacing between the two slits
a smaller solenoid is placed inside a larger solenoid so they have the same axis like concentric cylinders. the inner
A 4.35 ohm resistor, a 5.33 ohm resistor, and a 13.54 ohm resistor are connected in series with a 24.0 V battery. What is the equivalent resistance
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