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A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 1.52 s after the first, and the third echo arrives 1.33 s after the second. Assuming that the speed of sound is 343 m/s and that there are no reflections of sound from the ground, find the distance (in m) between the cliffs.
A straight horizontal garden hose 22.0 m long with an interior diameter of 1.10 cm is used to deliver 20oC water at the rate of 0.470 liters/s.
Find out the final speeds of the two objects. What is the angle at which the object with mass 3m is scattered?
A satellite orbits a planet of unknown mass in a circle of radius 2.0*10^7m?The magnitude of the gravitational force on the satellite from the planet is 74 N. What is the kinetic energy of the satellite in this orbit
erson decides to use an old pair of eyeglasses to make someoptical instruments. What is the maximum angular magnification he can produce in a telescope
Two musicians are comparing their clarinets. The first clarinet produces a tone that is known to be 442Hz, If the second clarinet produces a higher pitched tone than the first clarinet, what is the second clarinet's frequency
A 0.0280 kg bullet moving horizontally at 500 m/s embeds itself into an initially stationary 0.500 kg block. What is their velocity just after the collision
q1. a parallel-plate capacitor has a plate area of 1cm1 and a plate separation of 2.5 mm. to obtain an electric field
Suppose a tank contains 737 m3 of neon (Ne) at an absolute pressure of 1.01 105 Pa, What is the increase in the internal energy of the neon
Two traveling waves with the same amplitude A, frequency f, and wavelength, but out of phase with each other by one quarter of a wavelength, aWrite the equation of the resulting traveling wave
A 0.520kg glider on an air track is attached to the end of an ideal spring with force constant 453N/m; it undergoes simple harmonic motion with an amplitude of 4.10×10?2m. Compute the maximum speed of the glider
A 40 kg skateboarder (Ms) on a 3 kg board (Mb) is training with two 5 kg weights (Mw). How fast is he propelled in the opposite direction after the weights are thrown
In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 56 m/s (around 130 mi/h) in a time of 7.2 s
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