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A certain automobile engine delivers 2.39 104 W (32.0 hp) to its wheels when moving at a constant speed of 25.0 m/s ( 56 mi/h). What is the resistive force acting on the automobile at that speed?
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A young girl with mass 35.5kg is sliding on a horizontal, frictionless surface with an initial momentum that is due east and that has magnitude 86.0kg?m/s, How much work has been done on the girl by the force in the time interval from t= 0s to the ..
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked. how far did they skid
A steel beam is placed vertically in the basement of a building to keep the floor above from sagging. Find the vertical compression of the beam
A block of rock has dimensions of 2m x 2m x 2m and a density of 3000kg/m^3. The weight of the rock produces a normal stress on its bottom side. Calculate the magnitude of the normal stress on this side.
A sea-going prirate's telescope expands to a full length of 29 cm and has an objective lens with a focal length of 26.9 cm. What is the focal length of the eye piece
A 38.0 kg box initially at rest is pushed 4.00 m along a rough, horizontal floor with a constant applied horizontal force of 125 N. determine the final speed of the box
Suppose 2.50 kg of 32 degrees C water is mixed with 9.30 kg of 65 degrees C water. If no heat is lost in this system, what is the final temperature of the water
q1. how much resistance must be inserted in mua circuit has l 12.6 mh and c 1.15the circuit to reduce the undamped
The de Broglie wavelength is lambda = h/p, but the momentum of a relativistic particle is not mv. what is the electron's de Broglie wavelength
The two parallel plates in the figure below are 2.0 cm apart and the electric field strength between them is 2.1 104 N/C. An electron is launched at a 45° angle from the positive plate. What is the maximum initial speed v0 the electron can have witho..
calculate and compare the energy released by (a) fusion of 1 kg of hydrogen deep within the sun and (b) the fisision of 1 kg U235 in a fission reactor
A distant galaxy is moving away from the earth with a speed that results in each wavelength received on the earth being shifted so that ??= 1.65 ?0
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