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At a certain location, the horizontal component of the earth's magnetic field is 2.2 x 10-5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight. Find the speed of the proton.
A 0.540 kg football is thrown with a speed of 15.5 m/s. What is the magnitude of the impulse delivered to the ball by the receiver
A particle executes simple harmonic motion with an amplitude of 7.1 cm. At what displacement (in cm) from the midpoint of its motion will its speed equal one half of its maximum speed?
A truck initially going 10m/s slams on the breaks. If the coefficient between the truck's tires and road is %u03BC=0.4, what is the minimum stopping distance of the truck
Two infinite lines of charge with equal linear chargedensities l(C/m) are placed along the x and y axis. Derive an expression for the magnitude of the electric field at an arbitrarypoint (x,y).
wo point charges are located as shown in the figure, with charge q1 = +1.6 C at x = ?3.0 m, y = 0, How much work must be done on the electron to move it to the origin
a vector representing 170 n is oriented at 32 degrees with the horizontal. what is the magnitude of its horizontal
Airplane emf A Boeing KC-135A airplane has a wingspan of 39.9m and flies at constant altitude in a northerly direction with a speed of 750km/h .If the vertical component of the Earth's magnetic field is 5.3×10^?6T , and its horizontal component is..
A car travelling east at 41.2 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25 m/s in 3.90 s.
Power transmission lines often use a form of electric current called alternating current, but in many regions, such as the Province of Quebec, high-voltage direct-current lines are used instead, What is the power loss due to resistance in the line
A hollow, conducting sphere with an outer radius of 0.258m and an inner radius of 0.210m has a uniform surface charge density of +6.68×10?6C/m^2. What is the electric flux through a spherical surface just inside the inner surface of the sphere
Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume that the masses of the chains, pulleys, and ropes are negligible and the crate is rising with an acceleration of 3.3 m/s..
In a skating stunt known as crack-the-whip, a number of skaters hold hands and form a straight line. obtain the magnitude of the centripetal force
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