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Starting from rest, a 12-cm-diameter compact disk takes 2.6s to reach its operating angular velocity of 1600rpm . Assume that the angular acceleration is constant. The disk's moment of inertia is 2.5×10?5kgm2.
Part A How much torque is applied to the disk?
Part B How many revolutions does it make before reaching full speed?
If an electron in a hydrogen atom makes a transition from the n = 7 to the n = 1 state, what is the wavelength of the photon emitted
The truncated form of the virial equation is P(VB) = RT , where B is a constant that depends only on temperature. Derive the expression for reversible isothermal work for a gas that obeys this equation of state.
The current in a 100 watt lightbulb is 0.800 A. The filament inside the bulb is 0.220 mm in diameter. What is the current density in the filament
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
A cylinderical wooden log rolls (without slipping) down a small ramp. The log has a radius of 15 cm, a length of 2.0 m, and a mass of 78 kg. What is the log's total kinetic energy at the bottom of the ramp
The cyclist speeds up to a cadence of 120 (120 rotations per minute) in a surge lasting 30 seconds. What is the magnitude of angular acceleration of the wheel
A beam of light is incident in air with an incident angle 56 degrees. calculate the index of refraction of this unknown liquid
If the current through the inductor (L = 25.1 mH) at 351 Hz has an amplitude of 45 mA, what is the rms value of the AC voltage
The three ropes are tied to a small, very light ring. Two of these ropes are anchored to walls at right angles with tensions T1 = 35 N andT2 = 70 N. What are the magnitude and direction of the tension Tvec3 in third rope.
A steel washer is suspended inside an empty shipping crate from a light string attached to the top of the crate, What is the coefficient of kinetic friction between the ramp and the crate
Two converging lenses (f1 = 8.50 cm and f2 = 5.90 cm) are separated by 17.4 cm. The lens on the left has the longer focal length. Locate the final image relative to the lens on the right
a shot putter threw a shot-put with a speed of 13.4 m/s at an angle of 43 above the horizontal. How far did the shot-put travel in the horizontal direction
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