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A boat, lost in the fog, moves towards an unseen cost line at 10 meter per second. Directly in their path on land is a foghorn emitting a 1000 Hertz tone, find the frequency of the sound that is heard on boat? (The speed of sound in air is 344 m/s).
What is the sound intensity level. One on an Incline--One Hanging A block of mass mA = 4.50 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, frictionless pulley to the second block of mass mB = 2.80 kg ha..
Light with an initial intensity of S0 passes through a vertical-oriented polarizer, and then passes through a second polarizer oriented 12.2° from vertical. find the direction (or possible directions) of the initial polarization
If the total momentum of a system is a constant, then we say that the total momentum is conserved. A consequence of Newton’s laws of physics is that the total momentum of a system is conserved whenever the net external force on the system is zero.
Find the magnitude of the magnetic flux through the floor of a house that measures 23m by 18m . Assume that the Earth's magnetic field at the location of the house has a horizontal component of 2.4×10^?5T pointing north, and a downward vertical compo..
a 4603.24 kg open train car is rolling on frictionless rails at 24.04 ms when it starts pouring rain. a few minutes
the mean free path of an oxygen molecule is 2.0 times 10-5 m when the gas is at a pressure of 120 pa and a temperature
A 1500-kg car moving east at 28.00m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
an unmanned spacecraft is in a circular orbit around the moon observing the lunar surface from an altitude of 49.0km .
A 3.8-cm-diameter circle lies in the xy-plane in a region where the electric field is E=(1600i + 1600j + 1600k) N/C. What is the electric flux through the circle
A sound wave is transmitted during water from one ship is reflected off another ship 22km away and returns to the sonar receiver on the first ship. What is the round trip transit time for the sound wave if the water temperature is 23C?
During a walk on the Moon, an astronaunt accidentally drops his camara over a 20.0m cliff. It leaves his hands with zero speed, and after 2.0s it has attained a velocity of 3.3 m/s downward. How far has the camera fallen after 4.0 s?
A construction hoist exerts an upward force of 500 N on an object with a mass of 50 kg. determine the power it expended to lift the object vertically for 10 seconds under these conditions
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