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A 30 Newton stone is dropped from a height of 10 meter, and strikes the ground with a velocity of 13 m/s. Find what average force of air friction acts on it as it falls.
A 2.38 mol sample of an ideal gas expands reversibly and isothermally at 278 K until its volume is doubled. What is the increase in entropy of the gas
An incompressible fluid is flowing through a pipe with a constriction. The pipe is on an incline with an angle of 30.0 degrees. What is the pressure in the narrow section of the pipe
An electron moves in a circular path perpendicular to a uniform magnetic field with a magnitude of2.03mT. If the speed of the electron is1.53107m/s, determine the following. the radius of the circular path
a 881 kg car is going 26 ms and the driver has to slam on his brakes to prevent an accident. assume that a total of
A +18 µc charge is 15 cm to the right of a -12 µc charge. What is the force on the positive charge
In a ballistics test, a 25 g bullet traveling horizontally at 1200 m/s goes through a 35-cm-thick 350 kg stationary target and emerges with a speed of 750 m/s. What average force does it exert on the target
A 5.83 m long ladder with mass 23.1 kg rests against a smooth wall. Find the force of friction between the ladder and the ground
A particular organ pipe can resonate at 231 Hz, 385 Hz, and 539 Hz, but not at any other frequencies in between. Is it an open or a closed pipe? What is the fundamental frequency of this pipe.
The Big Bang theory states that the beginning of the universe was accompanied by a huge burst of photons. Calculate the peak wavelength of this radiation
A railroad car of mass 2.3 104 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
The electric potential due to the charge distribution?
A ski tow operates on a 15o slope of length 300 meter. Calculate the power required to operate the tow
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