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A fireman d = 46.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of ?i = 33.0° above the horizontal. If the speed of the stream as it leaves the hose is vi = 40.0 m/s, at what height will the stream of water strike the building?
An arrangement of two pulleys, as shown in the figure, is used to lift a 46.0-kg mass a distance of 3.20 m above the starting point. What is the change in the potential energy of the weight when it is lifted a distance of 3.20 m
The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diametern. what is the density of the material
A pilot takes off from a city in Northern California and aims her airplane due North toward Seattle with a speed 240 km/h relative to the air. What is the magnitude of the airplane's velocity relative to the Earth
A 66.5kg astronaut is doing a repair in space on the orbiting space station. She throws a 2.30kg tool away from her at 3.10m/s relative to the space station, With what speed will she begin to move
A 4.70 kg mass causes a vertical spring to stretch 0.850 meters. The spring is after that stretch and extra 0.270 meters and release (as a stopwatch starts) causing the spring and mass to oscillate.
How fast should the platform move, v_p, for the person to detect a beat frequency of 7.00 Hz ? Take the speed of sound to be 344 m/s. Express your answer numerically in meters per second.
What does halving the frequency of a wave do to the other properties of a wave, like speed, amplitude, wavelength, period, etc.) Describe what happens to the wavelength, frequency, and spped of a wave as it moves from glass to air.
A 2-meter long prism with square cross-section of side 0.1m is made of stainless steel with a thermal conductivity k=14.9W/m degrees C. Determine the temperature distribution inside the prism
Consider two long straight parallel wires, each carrying 5 amps. These wires are 0.04 m apart. What is the magnitude of the magnetic field half way between these two wires
A landing airplane makes contact with the runway with a speed of 78.0 m/s and moves toward the south. After 18.5 seconds, the airplane comes to rest. What is the average acceleration of the airplane during the landing?
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.25 103 N, Find the instantaneous acceleration of the puck
Suppose the wheel is rotated at a constant rate so that the mass has an upward speed of 4.67 m/s when it reaches a point P. What is the maximum height, h, the mass will rise above the point P
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