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A detector of a fixed size measures the intensity of light emitted from two different sources. One emits spherical waves, the other plane waves. From which source does the intensity drop off faster with distance? Explain.
A 18.0 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 8.76 V in 1.22 µs. (a) Calculate the time constant of the circui..
A 33.4 cm focal-length converging lens is 24.8 cm behind a diverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
what would be the restoring force on the pendulum at an angle of 6.24deg from the equilibrium
The steel I-beam in the drawing has a weight of 3.51 × 103 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends
The left end of a long glass rod 8.00 cm in diameter, with an index of refraction of 1.60, Find position in air of image if the left end of the rod were polished to a plane surface
If a wave vibrates back and forth six times each second, and its wavelength is 7 meters, what is its frequency, period, and speed
Explain how Einstein’s contribution to understanding the force between the earth and the moon differed from Newton’s. Include a brief statement of Einstein’s explanation in your answer.
an electron moving at 3.70 x 103 ms in a 1.45 t magnetic field experiences a magnetic force of 1.40 x 10-16 n. what
An archer pulls her bowstring back 0.370 m by exerting a force that increases uniformly from zero to 227 N. (a) What is the equivalent spring constant of the bow?
During a lunar eclipse, the moon, earth, and sun all lie on the same line, with the Earth between the Moon and the sun. Calculate the force exerted on the Earth by the moon
a sealed 29 m3 tank is filled with 9000 moles of ideal oxygen gas diatomic at an initial temperature of 270 k. the gas
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 9.8s, What force is required at the edge
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