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The projection lens in a certain slide projector is a single thin lens. A slide 23.9 mm high is to be projected so that its image fills a screen 1.84 m high. The slide-to-screen distance is 2.96 m. Determine the focal length of the projection lens.
A circular wire loop whose radius is 15.0 cm carries current of 2.50 A. What torque acts on the loop
A 23.0-N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface, What is the force of friction acting on the block if T = 20.56 N
A 600-m tall tower casts a 600-m long shadow over a level ground. At what angle is the sun elevated above the horizon
The sound intensity level of a jet plane going down the runway as observed from a certain location is 105 dB
Your 85-kg friend (modeled in the picture as a box) is a window-washer and leans a ladder against a large frictionless window. What is the force from the wall on the ladder
x rays with a wavelength of .12nm undergo first-order diffraction from a crystal at 80 degree angle of incidence
If a 0.34kg kickball is rolled towards a kicker at 8.1m/s and then is kicked at its velocity of -12.0m/s, what impulse is acting in the kickers foot
question1a stable nucleus is composed of z protons and n neutrons. is the mass of nucleus identical to the sum of the
A particular race car can cover a quarter-mile track (402m)in 6.40s starting from a standstill. what horizontal force must the road exert on the tires
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 660N on the earth, what would be your weight on the surface of a neutron star that has the same mass as ..
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 15 in 10.6. What force is required at the edge
A lead ball is dropped into a lake from the diving board 30 m above the water. After entering the water, it sinks to the bottom with the constant velocity equal to velocity with which it hit the water. The ball reaches the bottom 10 s after it is ..
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