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A narrow but solid spool of thread has a radius R and mass M. If you pull up on the thread therefore that the center of mass of the spool remains suspended in the air at the same place as it unwinds,
(a) compute what force must you exert on the thread?
(b) Compute how much work has you done by the time the spool turns with an angular velocity ω?
Two 10-cm-diameter charged rings face each other, 16.0 cm apart. What is the electric field strength at the center of the left ring
a steam pipe is covered with 1.50 cm thick insulating material with a thermal conductivity of 0.200
A 0.70-kg mass attached to a vertical spring of force constant 140N/m oscillates with a maximum speed of 0.40m/s, Find the maximum magnitude of the acceleration
Lithium, beryllium, and mercury have work functions of 2.30eV,3.90eV, and 4.50eV respectively. Find the maximum kinetic enery for the photoelectrons in each case
a what would brewsters angle be for reflections off the surface of water when the light source is beneath the surface?b
Object 1 has a mass m1 and a velocity 1 = (2.87 m/s). Object 2 has a mass m2 and a velocity 2 = (3.01 m/s). The total momentum of these two objects has a magnitude of 18.0 kg • m/s and points in a direction 66.5° above the positive x-axis. Find out m..
Find the theoretical value for the acceleration for an object sliding down an incline plane. Ignore friction. Your answer should include a free-body-diagram as well as the sum-of-the forces equations.
Using Ampère's law, calculate the magnetic field inside and outside of a toroidal coil with a radius of 25 cm
A parallel plate capacitor has a capacitance of 5.9 ?F when filled with a dielectric. What is the dielectric constant of the dielectric
questiona girl of mass mg is standing on a plank of mass mp. both are initially at rest on a frozen lake that
A 20.0 kg box is pulled up a ramp a distance d = 15.0 m with a force of Fp = 165 N parallel to the ramp, as shown in the figure to the right. Find the work done on the block by gravity
a bug sits on the edge of a spinning wheel of radius .2m which is rotating counter clockwise at a rate of 6 rad/sec and slowing down at a rate of 4 rad/s^2. what is the magnitude of the tangential acceleration
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