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The density of aluminium is 2700 kg/m3. What is the velocity of a wave that propagates along a cylindrical aluminium wire that has a radius of 2.30 mm and is under a tension of 58.0 N?
A student sits on a freely rotating stool holding two dumbels, each of mass of 3.00kg. find the kinetic energy rotating system before and after he pulls the dumbbells inward
The power output of a cyclist moving at a constant speed of 4.8 m/s on a level road is 140 W. What is the force exerted on the cyclist and the bicycle
a uniform magnetic field b is perpendicular to the plane of a circular loop of diameter 10 cm formed from wire of
Two waves are traveling in the same direction along a stretched string. The waves are 90.0degrees out of phase. Find the amplitude of the resultant wave
A rifle fires a 2.39 10-2-kg pellet straight upward, since the pellet rests on a compressed spring that is released when the trigger is pulled. The spring has a negligible mass and is compressed by 9.17 10-2 m from its unstrained length. The pellet r..
What are the max and min values of the instantaneous power?
A child throws a stone from the top of a 15 m cliff with a speed of 20 m/s. If the stone weights 2 N, find its kinetic energy and speed when it lands on the ground
One end of a string, 15 mlong, is moved up and down with a simple harmonic motion at a frequency of 30 Hz. What is the wavelength of the waves on the string
A boat has a mass of 6800 kg, Its engines generate a drive force of 4100 N, due north, while the wind exerts a force of 800 N, What is the magnitude and direction of the boat's acceleration
A heat engine absorbs 250 kcal of heat from a high temperature reservoir and exhaust 175 kcal to a low temp recover. Decide engine's thermal efficiency from the efficiency of an ideal gas heat engine,
A soldier is tasked with measuring the muzzle velocity of a new rifle. Knowing the principles of projectile motion, What is the most accurate muzzle velocity that the soldier can report to his sergeant
A review of the basics of circular motion: The radius of a merry-go-round is 5 meters, and it takes 12 seconds to go around once. What is the direction of the velocity of this atom
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