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An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.0 MJ when the flywheel is rotating at 1.4×10^4 revolutions per minute.
What is the moment of inertia of the flywheel?
K=...?... kg*m^2
A cylindrical vessel 16 feet in diameter and 15 in height is constructed to withstand a maximum internalpressure of 500 psia. What is the maximum weight of nitrogen
A spring has a spring constant k = 0.84 N/m. If it is stretched 0.13 m from its equilibrium position, what is the restoring force of the spring
If this lens is then immersed in silicone oil with a refractive index of 1.52, what will the focal lens of the lens be in this environment
Although physics problems often assume that inductors have zero resistance, actual inductors can, in fact, have appreciable resistance. What is the inductance of the inductor
A uniform thin rod of length 0.40 m and mass 3.0 kg can rotate in a horizontal plane about a vertical axis through its center. what is the bullet's speed just before impact
A positive point charge Q is on the y axis at y = D; a negative point charge -2Q is at the point x = D, y = D. Find the potential for points on the x axis
q. a solid nonconducting sphere of radius r has a positive charge q distributed uniformly throughout its volume. since
The total amount of energy stored in an LC series circuit is 8.00 J. When the current through the inductor is equal to half its maximum value, how much energy is stored in the electric field
A long, solid rod 4.5 cm in radius carries a uniform volume charge density. what is the volume charge density
Two slits separated by a distance of d = 0.13mm are located at a distance of D = 710mm from a screen. What is the pathlength difference between the two waves from the two slits at the first (m=1) maximum on the screen
Suppose a 65 kg person stands at the edge of a 6.5 m diameter merry-go-round turntable that is mounted on frictionless bearings and has a moment of inertia of 1850 kg m2. Calculate the angular velocity of the turntable
Many nuclear reactors use heavy water moderators in which elastic collisions occur between neutrons and deuterons of mass 2.0 u. What is the speed of a neutron, expressed as a fraction of its original speed
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