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Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5[m] diameter and a mass of 250[kg]. Its maximum angular velocity is 1200[rpm] A motor spins up the flywheel with a constant torque of 50 [N*m]. How long does it take the flywheel to reach top speed?
A toy cannon uses a spring to project a 5.30 g soft rubber ball. The spring is originally compressed by 5.00 cm, At what point does the ball have maximum speed
A lead bullet initially at 26.4oC melts just upon striking a target. calculate the speed of the bullet upon impact
In a series circuit, a generator (1436 Hz, 14.7 V) is connected to a 15.2-? resistor, a 3.85-µF capacitor, and a 5.47-mH inductor. Find the voltage across each circuit element
A 4.9-N hammer head is stopped from an initial downward velocity of 3.2 m/s in a distance of 0.45 cm by a nail in a pine board. Calculate the downward force F exerted by the hammer head on the nail while the hammer head is in contact with the nail a..
You have a 77.7-cm-long copper rod with a rectangular cross section of dimensions 5.75 cm by 8.13 cm. Find the heat current through the rod
The carbon monoxide molecule (CO) consists of a carbon atom and an oxygen atom separated by a distance of 1.13 x 10-3m. Determine the location of the center of mass of this molecule relative to the carbon atom
question1a 44.0 kg child is in a swing that is attached to ropes 1.90 m long.the acceleration of gravity is 9.81
A 22-turn circular coil of radius 4.20 cm and resistance 1.00 O is placed in a magnetic field directed perpendicular to the plane of the coil. Calculate the induced emf in the coil at t = 5.20 s
A car traveling at a constant speed of 22.5 m/s passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.90 m/s2.
A uniform metal rod, with a mass of 3.3 and a length of 1.4 , is attached to a wall by a hinge at its base. A horizontal wire bolted to the wall 0.59 above base of the rod holds the rod at an angle of 25 above the horizontal. The wire is attached ..
A cosmic ray electron moves at 7.85 x 10e6 m/s perpendicular to the earth's magnetic field at an altitude, What is the radius of the circular path the electron follows
A catapult on a cliff launches a large round rock towards a ship on the ocean below. The rock leaves the catapult from a height H of 33.0 m above sea level, To what height above sea level does the rock rise
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