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A man standing a certain distance from an airplane with four equally noisy jet engines is experiencing a sound level of 140 dB. Find what level would this man experience if the captain shutdown all but one engine?
An AC series circuit has 12.0 ? resistance, 15.00 ? inductive reactance and 10.00 ? capacitive reactance. obtain the power output
When monochromatic light shines perpendicularly on a soap film (n = 1.33) with air on each side, What is the vacuum wavelength of the light
a 78 g ice cube at -18degc is placed in a lake whose temperature is 12degc. calculate the change in entropy of the
Two blocks of masses M and 3M are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring among them, as seen in the figure below.
A child pulls a 3.00-kg sled across level ground at constant velocity with a light rope that makes an angle 30.0 degrees above horizontal. what is the coefficient of friction between the sled and the ground
The coefficient of static friction is .8 between the soles ofa sprinters shoes and the level track surface she's running on. Determine the maximum acceleration she can achieve
A 20-cm-diameter vertical cylinder is sealed at the top by a frictionless 18kg piston. What is the gas pressure inside the cylinder
A 58 kg gymnast does a vault. He is traveling at 5.6 m/s just before he lands. He comes to a stop in 0.08 s. What is the average net force acting on him during this time
An ion in a mass spectrometer is accelerated during a voltage of 45 V. The ion has a mass of 6.634 X 10 ^-26 kg. It passes during a magnetic field strength of 0.080 T and its path has a radius of 53.99 mm. What is the charge on the ion?
An arrow is launched vertically upward from a crossbow at 97.9 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneou..
Consider a gas of hydrogen atoms...At what temperature will an equal number of atoms have electrons in the ground (n=1) state and in the second (n=3) excited state?
A piece of moon rock reads 3.261 N on a scale when in air, but 2.074 N in a fluid having a density of 870 kg/m3. What is the density of the moon rock in kg/m3
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