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An alpha particle (the nucleus of a helium atom) consists of two protons and two neutrons. An alpha particle is injected horizontally with a speed of 2.45 x 105 m/s into a region with a vertical magnetic field. If it takes 226 ns for the alpha particle tocomplete half of a revolution, what is the strength of the magnetic field?
A person weighing 700N on a wire. find the tension force in the two segments of the wire. left wire 20 degrees and right wire 40 degrees.
Two long straight parallel wires are 19cm apart. Wire A carries 2.0-A current. Wire B's current is5.0A in the same direction, Determine the force per unit length on wire B due to wire A
An 18 g rifle bullet travelling 210 m/s buries itself in a 3.6 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of pendulum's displacement.
A 1650-kg car is travelling at 31.2 m/s. How fast must a 91.0-kg bicycle and rider be travelling to have the similar kinetic energy as the car.
At a certain instant a ball passes location m. In the next 4 seconds, the ball's average velocity is m/s. At the end of this 4 second time interval, what is the height y of the ball?
26 g of copper pellets are removed from a 300 degree Celsius oven and straight away dropped into 116 mL of water at 25 degree Celsius in an insulated cup. What will the new water temperature be.
If the accelerating plates are 1.60 apart, and have a potential difference of 2.60×10^4, what is the magnitude of the uniform electric field between them.
The loaded cab of an elevator has a mass of 2.8 x 10^3 kg and moves 214 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab.
A solid cylinder of mass 148.7 kg and diameter 0.72m has mounted to rotate around its axis, the cylinder has an initial angular velocity of wi, and the mass is 26m below the cylinder
A helicopter is ascending vertically with a speed of 5.30{rm m/s}. At a height of 120 {rm m} above the Earth, package is dropped from a window.
A flight attendant pulls her 70 N flight bag a distance of 247 m along a level airport floor at a constant speed. The force she exerts is 33.00 N at an angle of 52° above the horizontal.
A 1kg ball released from horizontal attatched to a 2.5 m string collides ellastically with a 2 kg block at rest. what is the speed of the block after the collision.
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