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You are hanging over the edge of a cliff. Your two friends throw down a rope and you hold on to the middle. In terms of your weight, what force would each of them have to exert to pull you up if they could each pull on one end of the rope as they stand side by side? If there is a tree directly above you and they have to stand on either side, what force would each of them have to exert assuming the rope forms a right angle where you are holding it?
A siphon tube is filled with gasoline and closed at each end. One end is inserted into a gasoline tank 0.15 m below the surface of the gasoline. What is the corresponding rate of flow of the gasoline
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad / s). what is the magnitude of the average angular acceleration of the disk
On a clear day at a certain location, a 150-V/m vertical electric field exists near the Earth's surface. At the same place, the Earth's magnetic field has a magnitude of 4.800 10-5 T. Compute the energy density of the electric field.
uniform thin rod of length L=2.5 m and mass 2 kg can rotate in a horizontal plane about a vertical axis through its center. what is the angular velocity of the rod immediately after the collision
A skier of mass 70kg starts on top of a frictionless hill of height 10m. Once the skier reaches the bottom the snow is mixed with sand and no longer frictionless. how far will the skier travel before he stops
Consider a group of 20 molecules with the following speeds: three have speed 1 m/s, Determine the rms speed (in m/s) of the molecules in this group at this instant in time
What is the charge on the surface of a conducting sphere of radius 0.15 m whose potential is 500 V (with V = 0 at infinity)
A uniform metal rod, with a mass of 3.3 and a length of 1.4 , is attached to a wall by a hinge at its base. A horizontal wire bolted to the wall 0.59 above base of the rod holds the rod at an angle of 25 above the horizontal. The wire is attached ..
At a particular instant an electron is traveling in the +y direction, with speed 7105 m/s. find the magnitude of the magnetic force on the electron
The index of refraction for violet light in silica flint glass is 1.66 and that for red light is 1.61. What is the angular dispersion of visible light
A cockroach of mass m lies on the rim of a uniform disk of mass 3 m that can rotate freely about its center like a merry-go-round. find the angular velocity of the cockroach-disk system
If a dielectric material with ? = 3.80 is inserted so that it fills the volume between the plates (with the capacitor still connected to the battery), how much additional charge will flow from the battery onto the positive plate
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