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Two adjacent sources each emit a frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so that an observer in front of the sources hears no sound?
A 16.8-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 73.0 N and is directed at an angle of 22 ° above the horizontal. Determine the coefficient of kinetic friction.
A supertanker (mass 1.70 x 10^8 kg) is moving with a constant velocity. Its engines generate a forward thrust of 7.40 X 10^5 N. Determine a) the magnitude of the resistive force exerted on the tanker by water and b) the magnitude of the upward buoyan..
The displacement of an object moving under uniform acceleration is some function of time and the acceleration. Suppose we write this displacement as s=ka^mt^n, where k is the dimensional constant. Show by dimensional analysis that this expression ..
A drag racer crosses the finish line, and the driver deploys a parachute and applies the brakes to slow down. Determine the average acceleration of the dragster
a circular roller coaster has radius 30 m. The speed at the bottom is 37.0 m/s. What does it read in kilograms at the top of the ride
A solar cell generates a potential difference of 0.10 V when a450 resistor is connected across it, and a potential difference of 0.15 V when a1200 resistor is substituted.
Two equal charges separated by a distance of 1 meter experience a repulsive force of 1,000 newtons. What is the strength in coulombs on each charge
An ideal massless spring is hanging vertically. When an unknown mass is attached to the spring, What is the frequency of the resulting oscillation
A block of mass 2 kg travels along a horizontal frictionless surface with velocity 3 m/s. What impulse was delivered to mass m
In the typical X-ray lamp. The electrons are accelearated in the potential difference of 10000V before hitting the water cooled electrode. Find the shortest wavelength of X-rays produced in this lamp.
At Sea World, a 32.0-kg seal slides down aramp into the pool below. What is the work is done by kinetic friction
A microscope has a 15.0? eyepiece and a 60.0? objective lens 20.0 cm apart. Calculate the focal length of the eyepiece
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