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A proton in the upper atmosphere moves at 9.8×105m/s , perpendicular to Earth's magnetic field, which at that point has magnitude 5.3×10?5T. Find the curvature radius of the proton's trajectory?
A 4.5 box slides down a 4.7 high frictionless hill, starting from rest, across a 1.6- -wide horizontal surface, afterwards hits a horizontal spring with spring constant 550 . The other end of the spring is anchored against a wall. The ground under..
A sanding disk with rotational inertia 2.0 multiply.gif 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of 8 N·m about the central axis of the disk. compute the angular momentum of the disk
A block of mass 2.50 kg is pushed 2.00 m along a frictionless horizontal table by a constant 16.0 N force directed 25.0° below the horizontal, Determine the work done by the force of gravity
A square coil of wire with 15 turns and an area of 0.40 m2 is placed parallel to a magnetic field of 0.75 T. What is the magnitude of the average induced emf
An object hanging in air, as in Figure A below, caused the scale to balance at 0.420 kg. Find the apparent weight of the object when submerged in water
A gas is contained in a cubic box whose sides are 3m long. If the gas is initially at 80 K, and it is heated up to 320 K at constant volume, What is the final pressure
A bicycle wheel has a diameter of 64.1 cm and a mass of 1.81 kg. suppose that the wheel is a hoop with all of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand and a resistive force of 120 N is applied tangent..
A student has built a 20-cm-long pinhole camera for a science fair project. She wants to photograph the Washington Monument, How far should she stand from the Washington Monument
For someone who chooses y=0 to be 5 meteres above the ground and up as positive, what will he get for the potential energy
A compact disk spins with angular velocity 44.7rad/s . The player is turned off, and 2.50s later the CD has stopped. Find its average angular velocity
find a horizontal force needed to pull a mass of 500 gram at constant velocity on a level surface and µk = 0.3?
A cannonball is shot (from ground level) with an initial horizontal velocity of 36 m/s and an initial vertical velocity of 21 m/s. What is the initial speed of the cannonball
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