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Standing on a balcony, you throw your keys to a friend standing on the floor below. One second after you release the keys, they have an instantaneous velocity of 13.9 m/s, directed 45o below the horizontal. Find what initial velocity did you give them?
A flower pot falls from the ledge of a building. A person in an apartment below, coincidentally holding a stopwatch, notices it takes 0.7s for the pot to fall past his window, which is 18m high. g=9.81m/s2. How far above the top of the window is t..
a 400 hz vibrating source produces a standing wave pattern in a 1.5 m string that contains two antinodes. when the same
The position of a particle is given by 0.10cos(10pi t) m, where t is in s. What are the frequency and the period
A sinusoidal wave on a string is described by the wave function y = 0.19 sin (0.90x ? 62t) where x and y are in meters and t is in seconds. The mass per unit length of this string is 12.0 g/m. Determine speed of the wave. m/s. Determine wavelength of..
A pulley, with a rotational inertia of3.2×10-3 kg m2 about its axleand a radius of 6.0 cm, is acted on by a force appliedtangentially at its rim. The force magnitude varies in time as F =0.58t + 0.24t2, where F is in newtons if t is given insecond..
A light beam of wavelength 500 nm in air hits transparent material. When the angle of refraction is 40.0 degrees, Find the polarizing angle
Consider an ideal gas at 27 degree C and 1 atm. To get some idea how close these molecules are to each other, What is the length of an edge of each cube if adgacent cubes touch but not overlap
For a certain transverse wave, the distance among two successive crests is 1.20 m and eight crests pass a given point along the direction of travel every 14.50s. Compute the wave speed.
The magnitudes of the four displacement vectors shown in the drawing are A = 20.0 m, B = 11.0 m, C = 12.0 m, and D = 21.0 m.
A 2.0 kg mass is projected from the edge of the top of a 20mtall building with a velocity of 24m/s at some unknown angle abovethe horizontal. find the kinetic energy of the mass just before it strikes the ground
In a very busy off-campus eatery one chef sends a 249-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.67 m/s. At what speed does it move
a cart of mass mc is being pulled by an object of mass mw. assume friction is negligible.a how many forces are acting
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