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A light bulb filament has a resistance of 110Ω. The bulb is plugged into a standard 120-V (rms) outlet, and emits 1.00% of the electric power delivered to it by electromagnetic radiation of frequency f. Assuming that the bulb is covered with a filter that absorbs all other frequencies, find the amplitude of the magnetic field 1.00 m from the bulb.
A proton resistor spring system in a magnetic field going out of the page has a mass of proton 1.67*10^-27 kg, a spring constant k=500 N/m and the resistor has r=5Ω. The magnetic field strength is 0.8T. a) When released from rest, calculate the ma..
Scientists have found evidence that Mars may once have had an ocean 1.00km deep. What would be the gauge pressure at the bottom of such an ocean
A long sighted person can only see clearly objects further than 1.2 m away.They wish to read a book held 30 cm away. Calculate the power (in diopters) of the lens in thier corrective spectacles:
A parallel-plate capacitor has plates of area .5 m^2 separated by a distance of 2.0 mm. What is this capacitor's capacitance
A square metal plate of edge length 12 cm and negligible thickness has a total charge of 7.2 x 10-6 C. Estimate the magnitude E of the electric field just off the center of the plate (at, say, a distance of 0.39 mm from the center) by assuming tha..
Westerly winds coming off the Pacific Ocean rise over the Rocky Mountains, what is the surface temperature and relative humidity on the leeward side of the mountains
do believe that we as a country should be taking more or less preventative measures against global warming?explain why
Estimate how far from a piece of paper you must hold the lens to produce a sharp image of a streetlight 40 ft. Overhead.
Bored, a boy shoots his pellet gun at a piece of cheese that sits, keeping cool for dinner guests, on a massive block of ice. What is the coefficient of friction between the cheese and ice
A 2.0 meter long pendulum is released from rest when the support string is at an angle of 25o. Evaluate the speed of the bob at bottom of the swing
a 270-kg object and a 570-kg object are separated by 4.40 m.a find the magnitude of the net gravitational force exerted
A 0.17 kilogram baseball is launched from the roof of a building15 meter above the ground. Find the speed of the ball as it strikes the ground
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