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A beam contains 3.0 x 106 doubly charged positive ionsper cubic centimeter, all of which are moving north with a speed of5.4 x 105 m/s. What is the magnitude of the currentdensity?
The motion of a body falling from rest in a resistive medium is dv(t)/dt=A-Bv(t): find the velocity at which the acceleration becomes zero
A wire is 2.5 m long. After applying a force to one end of thewire, it is now 2.506 m long. Calculate the tensile strain in the wire
Consider a person on the moon who launches herself into a satnding broad jump at 45 degrees. What is the range of the jump
A flight attendant pulls her 73 N flight bag a distance of 245 m along a level airport floor at a constant velocity. The force she exerts is 45 N at an angle of 54° above the horizontal.
An object is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2
A 8500-kg boxcar traveling at 13m/s strikes a second boxcar at rest. what is the mass of the second car
q1. when a surface is irradiated with light of wavelength 4950 a a photo current appears that vanishes if a retarding
A hollow cylinder (hoop) is rolling on a horizontal surface at speed 5.5m/s when it reaches a 11?incline. How far up the incline will it go
Workers are dragging a 610kg block up a dirt ramp that isinclined at 13o above the horizontal. They are exertinga 5600-N force parallel to the ramp. The block is accelerating at0.49 m/s2
An object of mass m=.200 kg is attached to a spring which is vibrating on a horizontell frictionless table. The spring has a spring constant k= 545 N/m.
If aliens were to drop an asteroid of a mass 10^14 kg from about the radius of the moon's orbit (384,000km), how much kinetic energy would it have
Two manned satellites approaching one another at a relative speed of 0.200 m/s intend to dock. Calculate the final velocity after docking
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