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A small rubber wheel on the shaft of a bicycle generator presses against the bike tire and turns the coil of the generator at an angular speed that is 42 times as great as the angular speed of the tire itself. Every tire has a radius of 0.306 m. The coil consists of 129 turns, has an area of 3.53 10-3 m2, and rotates in a 0.0810-T magnetic field. The bicycle starts from rest and has an acceleration of +0.525 m/s2. What is the peak emf produced with the generator at the end of 5.39 s?
What should the charge (sign and magnitude) of a particle of mass 1.487 be for it to remain stationary while placed in a downward-directed electric field of magnitude 630.
Two lenses, of focal lengths 2.4 cm and 32.0 cm, are used to build a small telescope, assuming that 2.4 cm is the focal length for the eyepiece. What is the angular magnification? How far apart are the two lenses in the telescope?
A solid disk of mass m1 = 9.5 kg and radius R = 0.2 m is rotating with a constant angular velocity of ? = 31.0 rad/s. A thin rectangular rod with mass m2 = 3.4 kg and length L = 2R = 0.4 m begins at rest above the disk and is dropped on the disk w..
A 0.230- coffee cup at 19 is filled with 0.240 of brewed coffee at 97. The cup and the coffee come to thermal equilibrium at 79.If no heat is lost to the environment, what is specific heat of the cup material.
q. a 2.1-kg block is released from rest and allowed to slide down a frictionless surface and into a spring. the far end
two square oppositely charged conducting plates measure 19 on each side. the plates are close together and parallel to
the earth completes a circular orbit around the sun in one year. the orbit has a radius of 93,000,000 miles. what is the speed of the earth around the sun in m/s? Report your result using scientific notation.
a resistor connected across an ac power supply has a current given by i 1.15a cos 300t when connected to a power
A car rounds a 200 m radius curve at 10.5 m/s. If the horizontal force acting on the car is 790 N, what's the car's mass
The figure shows three blocks attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; what is the tension in the cord at the right
an electron that has a velocity with x component 2.9 x 106 ms and y component 3.7 x 106 ms moves through a uniform
A 5.00 kg block is sliding along a flat surface when it runs into an uncompressed spring with spring constant 352 N/m. The block compresses the spring by 0.185 m before stopping. If the coefficient of kinetic friction between the block and floor is 0..
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