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An athletic can twirl a baton so that it reaches an angular velocity of 12 rad/s from rest in 0.5 s. If the length of a uniform baton is 0.8 m and the mass is 0.5 kg, what is the torque needed to reach the angular velocity?
A high-frequency photon is scattered off of an electron and experiences a change of wavelength of 8.0×10-4 .At what angle should a detector be placed to detect scattered photon (relative to the direction of the incoming photon).
a proton is rotating in a 7.19 * 10^ -11 m radius circle with a frequency of 5 * 10 ^15 Hz, How large is the resultant magnetic field
A high-voltage power line carries a current of 140 at a location where the Earth's magnetic field has a magnitude of 0.59 G and points to the north, 69 below the horizontal.
what is the lumberjack's speed relative to the shore? Neglect friction between the log and the water.
What is the approximate mass of an object whose weight equals the force in part (b).
How much work is needed to push a 132- kg packing crate a distance of 2.35 m up an inclined plane that makes an angle of 26 o with the horizontal, when inclined plane is frictionless
The drill bit of a variable-speed electric drill has a constant angular acceleration of 5.65 rad/s2. The initial angular speed of the bit is 6.56 rad/s. what angle has the bit turned through
A small, 1.80-mm-diameter circular loop with R = 1.00×10-2 ohms is at the center of a large 110-mm-diameter circular loop. What is the induced current on the inner loop
A red laser from the physics lab is marked as producing 632.8-nm light. When light from this laser falls on two closely spaced slits, What is the wavelength of light produced by the pointer
The positions at a, b and c are (40,450), (112,380), (600,150). Calculate the angles of Ufinal and Uinitial. Are the angles significantly different
A spring is hung from the ceiling. A 0.430 -kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
A dolphin jumps with an initial velocity of 12.5 m/s at an angle of 36.0° above the horizontal. how high above the water is the center of the hoop
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