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Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 110 π rad/s. One such flywheel is a solid, uniform cylinder with a mass of 310 kg and a radius of 0.790 m.
(a) What is the kinetic energy of the flywheel after charging?
(b) If the truck uses an average power of 7.1 kW, for how many minutes can it operate between chargings?
A 99 kg man lying on a surface of negligible friction shoves a 71 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man need as a result.
The magnetic field in an electromagnetic wave has a peak value given by B = 3.3uT. Find the peak intensity. Find average intensity
Suppose that an ion source in a mass spectrometer produces doubly ionized gold ions (Au2+), Determine the radius of the path
At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis, What is the radius of a chamber
David is driving a steady 24 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant while David passes. How far does Tina drive before passing David.
You are an engineer in charge of designing a new generation of elevators for a prospective upgrade to the empire state building. Before the state legislature votes on funding for the project.
A parallel plate capacitor has a capacitance of 4.5 µF when filled with a dielectric. The area of each plate is 3.3 m2 and the separation between the plates is 8.00 10-5 m. What is the dielectric constant of the dielectric?
After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 1.69 km away. What distance did the dog run
Suppose two identical spheres are insulated: sphere A carries +3.54Q and sphere B carries -20.2Q, What is the charge on sphere A now
A loud speaker is playing rock music. Consider the sound from it as a spherical wave. what is the sound intensity level
Suppose you want to make a rainbow by spraying mist from a garden hose into the air. Why can't you ever walk under the rainbow
The difference in potential between the accelerating plates of a TV set is about 26000 V. If the distance between these plates is 1.5 cm, find out the magnitude of the uniform electric field in this region.
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