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A long, straight wire of length 1.3 m carries current I = 3.1 A. If a magnetic field of magnitude B = 1.7 T is directed perpendicular to the wire, what is the magnitude of the force on the wire?
Makeshift child's swing: Child's weight, magnitude of force, maximum angle, A makeshift swing is constructed by making a loop in one end of a rope and tying the other end to a tree limb.
When a potential difference of 140V is applied to the plates of an air-filled parallel-plate capacitor the plates carry a surface charge density of 4.20E-10
A 250MW laser pulse is focused with a lens to a diameter of 2.5?m. What is the laser beam's electric field amplitude at the focal point
An airplane is flying with a velocity of 90 m/s at an angle of 25 above the horizontal. When the plane is a distance 126 straight above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
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..
The proper length of one spaceship is 2.8 times that of another. The two spaceships are travelling in the same direction and, while both are passing overhead, an Earth observer measures the two spaceships to be the same length.
A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to ground.
Tim and Rick both can run at a constant speed Vr and walk at the constant speed Vw, (Vw
A superhero flies 287 meters from the top of a tall building at an angle of 17 degrees below the horizontal. What is the vertical component of the superhero's displacement? Answer in units of meters. The horizontal is 274.459 meters and the vertical ..
Assume that the net horizontal force is due to rolling friction only and take free-fall acceleration to be = 9.80 .What is the coefficient of rolling friction for the tire under low pressure.
When the plane atats to accelerate for take off, a man is holding the pocket watch steady by its 20cm chain, Estimate the takeoff velocity of the plane
The 20-cm-long wrench in the figure swings on its hook with a period of 0.74s, What is the wrench's moment of inertia about the hook
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