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The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force. Suppose a charged particle traveling with a speed of 8.84E+6 m/s encounters the earth's magnetic field at an altitude where the field has a magnitude of 1.23E-7 T. Assuming that the particle's velocity is perpendicular to the magnetic field, calculate the radius of the circular path on which the particle would move if it were an electron.
It takes an elevator 3.4 minutes to raise a vehicle with a mass of 366 kg from the floor to a height of 7 meters. What size (power) motor (in watts) does it take to do the job
A chair of weight 135 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 38 directed at an angle of 42 below the horizontal and the chair slides along the floor.
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 4.41 × 10-11 m. Determine the magnitude..
A school yard teeter-totter with a total length of 5.2m and a mass of 36kg is pivoted at its center. A 19 kg child sits on one end of the teeter-totter.
A sled weighing 1.0 X 10^2 N is held in place on a frictionless 20.0 degree slope by a rope attached to a stake at the top. The rope is parallel to the slope. What is the normal force of the slope acting on the sled.
A 3 meter long 200kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction.
A swimmer heads directly across a river, swimming at 1.60 m/s relative to the water. She arrives at a point 58.0 m downstream from the point directly across river, 63 m wide. What is the speed of the river current.
One side of the roof of a building slopes up at 34.0°. A student throws a Frisbee onto the roof. It strikes with a speed of 15.0 m/s and does not bounce, but slides straight up incline. The coefficient of kinetic friction between plastic and roof is ..
A woman is riding a Jet Ski at a speed of 28.8 m/s and notices a seawall straight ahead, what is the minimum distance from the seawall that she can begin making her turn and still avoid a crash
A series RL circuit with L = 3.00 H and a series RC circuit with C = 3.00 μF have equal time constants. If the two circuits contain the similar resistance R.
The first puck is deflected 35.8° to the right and moves off at 0.331 m/s. Find out speed of the second puck after the collision.
In a ballistics test, a 25.00 g bullet travelling horizontally at 1300m/s goes through a 20.00 cm thick 450 kg stationary target and emerges with a speed of 800m/s. The target is free to slide on a smooth horizontal surface. How long is the bullet..
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