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A playground merry-go-round has a radius of 3.0 m and a rotational inertia of 603 kg. m2. It is initially spinning at 0.80 rad/s when a 20-kg child crawls from the center to the rim. When the child reaches the rim, What is the angular velocity of the merry-go-round?
A point charge 8.00 nC is at the center of a cube with sides of length 0.200m. what is the electric flux through: (a) the surface of the cube (b) on of the six faces of the cube?
A proton is in a vacuum near the surface of Earth. Where should a second proton be placed so that the electrostatic forceit exerts on the first proton balances the weight of thefirst proton?
A 50.0 g object is attached to ahorizontal spring with a force constant of 5.0 N/m and released from rest with an amplitude of25.0 cm. What is the velocity of theobject when it is halfway to the equilibrium position if the surface is frictionless
If the parachutist comes to rest with fix acceleration over a distance of 0.660 meter, find what force does the ground exerts on her
An electron is constrained to the central perpendicular axis of a ring of charge of radius 2.7 m and charge 0.024 mC. See Section 22-6. Suppose the electron is released from rest a distance 0.028 m from the ring center.
Consider neon, a noble gas whose molecules consist of single atoms of atomic mass 0.02 kg/mol. Avogadro's number is 6.02 × 1023 mol-1, what is the average kinetic energy of a neon atom
Two different wavelengths of light are incident on a diffraction grating. One wavelength is513nm and the other is unknown. If the3rdorder of the unknown wavelength appears at the same position as the2ndorder of the 513 nm light, what is the value of ..
A particle of mass M is subjected to a force F(t) = kte-alphat, where k is a constant and alpha = 0.5 s-1. If the particle is initially at rest, calculate the position, velocity and acceleration as a function of time.
A solenoid1.20m long and2.80cm in diameter carries a current of21.0A. The magnetic field inside the solenoid is 21.0mT. Find the length of the wire forming the solenoid.
It is desired to construct a solenoid that will have a resistance of 5.00 ohm (at 20°C) and produce a magnetic field of 4.00 x 10-2 T at its center when it carries a current of 3.60 Amp. Calculate the length the solenoid should have
Dario, a prep cook at an Italian restaurant, spins a salad spinner and observes that it rotates 20.0 times in 5.00 seconds, What is the angular acceleration of the salad spinner
A horizontal power line of length 58.2 m carries a current of 2.18 kA northward .The Earth's magnetic field at this location has a magnitude of 5.30 X10^-5 T. Find the magnitude of the magnetic force on the power line
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