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A tourist in Yellowstone National Park takes a photograph of a buffalo that is 40 meter away and 2.2 meter tall. If the lens has a focal length of 50 millimeter, find how large is the image of the buffalo on the film?
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After deploying her parachute, a skydiver falls through the air with a constant speed of 8.00 m/s . As she falls, there is a constant breeze blowing west at 2.50 m/s. At what angle from the downward vertical does the par ...
Question: It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station is constructed as a 1000-m-diameter cylinder that rotates about its axis. The inside surface is the de ...
A square hockey table has a side length of s=1.52m. On the table, pucks slide across a horizontal table with effectively no friction. (Ignore friction). At the time t=0s a puck is launched with a speed of v1=0.300 m/s fr ...
Question: A slide projector needs to create a 84 cm high image of a 2.0 cm tall slide. The screen is 240 cm from the slide. Assume that it is a thin lens. (a) What focal length does the lens need? cm (b) How far should y ...
Question: A rocket starts from rest and moves upward from the surface of the earth. For the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay=(2.60m/s3)t, where the +y-direction is upward ...
Question: A rifle with a barrel length of 57 cm fires a 11 g bullet with a horizontal speed of 370 m/s . The bullet strikes a block of wood and penetrates to a depth of 12 cm . 1- What resistive force (assumed to be cons ...
Question: Some passengers on an ocean cruise may suffer from motion sickness as the ship rocks back and forth on the waves. At one position on the ship, passengers experience a vertical motion of amplitude 1.6m with a pe ...
Question: A sump pump (used to drain water from the basement of houses built below the water table) is draining a flooded basement at the rate of 0.55 L/s, with an output pressure of 2.9 Ã- 105 N/m2. a) The water enters ...
Suppose the convention were adopted that defines W and W 0 in the first law of thermodynamics to be the "work done on the system by the surroundings." a. Write the first law with this alternate convention. b. Why do the ...
Question: To take off from the ground, an airplane must reach a sufficiently high speed. The velocity required for the takeoff, the takeoff velocity, depends on several factors, including the weight of the aircraft and t ...
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