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A tennis player standing 10.7 m from the net hits the ball at 2.50° above the horizontal. To clear the net, the ball must rise at least 0.188 m. If the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the racquet? Answer should be in m/s.
White light illuminates an oil film on water. Viewing it directly from above, What is the refractive index of the oil
When a surfer rides an ocean wave on her surfboard she is actually riding on. a. a crest that is toppling over. b. a trough of the wave. c. The rest position of the wave. d. A region of rarefaction.
Consider an object attached to an ideal spring that oscillates according to the equation x=(34.0 cm) cos (8.10£) where £ is in seconds. what is the mechanical energy of the oscillations
How far apart are an object and an image formed by a 75-cm focal-length converging lens if the image is 2.64 X larger than object and is real.
The mass of a robot is 4340 kg. This robot weighs 3000 N more on planet A than it does on planet B. Both planets have the same radius of 2.37 × 107 m
A nichrome toaster wire, initially at room temperature, carries 2.72A immediately after it's turned on. After the wire heats, the current drops to 2.44A
The ball leaves his racket with a speed of 16.0 m/s at an angle 5.5 degrees above the horizontal. The horizontal distance to the net is 7.0 m and the net is 1.0 m high. Explain by how much did the ball clear the net?
One icy day, my brother Nate decides to load boxes into his commissary truck by sliding them up a ramp into the back of his truck, find the minimum velocity necessary such that when the box comes to rest it will stay at rest
A camera takes a perfectly exposed picture when the lens diaphragm is set to f/4 and the shutter speed is 1/250 s, what should the new shutter speed be so that the exposure is still correct
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530nm, What is the work function of this material
Four point charges, Q1(-15,0,15), Q2(15,0,15), Q3(15,0,-15) and Q4(-15,0,-15) in cartesian coordinates are surrounded with air. If charges Q2 = -Q3 = 2 microCoulomb, Find the forces applied to each point from other charges
A parachutist with a camera, both descending at a speed of 11 m/s, releases that camera at an altitude of 140 m. Explain how long does it take the camera to reach the ground?
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