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a lens of focal length 1500 mm is used to project an image of the sun. If the sun subtends an angle of .50, what is the diameter of the image?
q1. a uniform solid ball rolls smoothly along a floor then up a ramp inclined at 20.4o. it momentarily stops while it
A particular nucleus of the element plutonium contains 94 protons and 150 neutrons. What is the magnitude of the force from the nucleus on a single electron that is at a distance of 0.563 × 10-12 m from the plutonium nucleus.
Two speakers, one directly behind the other, are each generating a 295-Hz sound wave. What is the smallest separation distance between the speakers that would produce destructive interference at a listener standing in front of them? Take the speed..
A 50 kg person performs a maximum vertical jump with an intial velocity of 2m/s. What is the performer's maximum kinetic energy during the jump
A beam of light is emitted 8.2cm beneath the surface of a liquid and strikes the surface 7.2cm from the point directly above the source. what can you say about the index of refraction of the liquid
Compute the net electric flux through the hull of the submarine. Is the number of electric field lines leaving the submarine greater than, equal to, or less than the number entering it?
Estimate the number of water molecules in a 250cm^3 glass of water. Each molecule dimensions is about 3.0 x 10^-10m.
A ferry transports tourists among three islands. It sails from the first island to the second island, 5.41 km away, Calculate the distance between the first and third islands
A classroom slide projector projects an enlarged (55 times taller) image of a 24 mm high photographic film onto a screen located 10 meters from the projector. What focal length lens (cm) does slide projector require to produce a sharply focus imag..
You are working on the analysis of rocks brought back from the Moon, What is the density of the rock
Two point charges, +3.09 µC and -6.05 µC, are separated by 1.33 m. What is the electric potential midway between them?
a ball moving at 5m/s collides head on elastically with a ball at rest. what are the velocities or the two balls after the collision
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