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A stationary horn emits a 113 Hertz tone. Find what frequency is heard by a passenger on a train which is moving towards this horn with a speed of 31.1m/s?
a scuba diver releases a 2.21 -diameter spherical bubble of air from a depth of 13.2 in a lake. assume the temperature
A 42.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.28*10^2 m/s from the top of a cliff 140 m above level ground, What is the initial total mechanical energy of the projectile
A train car with mass m1 = 527 kg is moving to the right with a speed of v1 = 8 m/s and collides with a second train car, What is the mass of the second train car
A 10-cm-long thin glass rod is uniformly charged to 50 nC. A small plastic bead, charged to - 5.4nC , is 4.5 cm from the center of the rod. What is the magnitude of the force on the bead? (N)
If the parachutist comes to rest with constant acceleration over a distance of 0.610 m, what force does the ground exerts on her.
A point charge of +6 μC is located at x = −2 cm, and a second point charge of −8 μC is located at x = 1 cm. Where must a third charge of +2 μC be placed so that the electric field at x = 0 cm is zero?
A 5 kg ball strikes a massive wall at 11 m/s at an angle of ?=65.0° with the plane of the wall. It bounces off the wall with the same speed and angle. what is the average force exerted by the wall on the ball in y direction
A soccer ball is kicked with an initial speed of 30 m/s at an angle of 25 degrees with respect to the horizontal. Find the maximum height reached by the ball
A beam of light is traveling in air and strikes a material. Theangles of incidence and refraction are 50.2° and 27.3°,respectively. Obtain the speed of light in the material
the drag on the hull of a ship depends in part on the height of the water waves produced by the hull. the potential
A carpenter tosses a shingle horizontally off an 8.8m--high roof at 8.0m/s , How far does it move horizontally
A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 6.60 cm. The hose ends with a nozzle of diameter 2.20 cm.
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