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A skateboarder shoots off a ramp with a velocity of 6.5 m/s, directed at an angle of 60 degree above the horizontal. The end of the ramp is 1.5 meter above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point on the ground directly below the top of the ramp.
(a) Determine how high above the ground is the highest point that the skateboarder reaches?
(b) When the skateboarder reaches the highest point, find how far is this point horizontally from the end of the ramp?
In a series RLC ac circuit, the resistance is 8.7 ohms, the inductance is 21.9 mH, and the capacitance is 14.5 microF. Calculate the maximum current in the circuit
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A Jetliner with an airspeed of 1000km/h sets out on a 1500-km flight due south. To maintain a southward direction, however, the plane must be pointed 15 degrees west of south. If the flight takes 100 min, what is the wind velocity ?
A mosquito flaps its wings 650 vibrations per second, which produces the annoying 650 Hz buzz. The speed of sound is 340 m/s. How far does the sound travel among wing beats? In other words, find the wavelength of the mosquito's sound.
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A long thin rod of mass M = 2 kg and length L = 75 cm is free to rotate about its center as shown. Two identical masses (each of mass m = 0.853 kg) slide without friction along the rod. how fast is the rod rotating
question1the index of refraction for red light in water is 1.331 and that for blue light is 1.340. if a ray of white
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