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In a certain region, the earth's magnetic field has a magnitudeof 5.1 x 10-5 T and is directed north at an angle of64° below the horizontal. An electrically charged bullet isfired north and 13° above the horizontal, with a speed of 630m/s. The magnetic force on the bullet is 3.6 x 10-10 N,directed due east. Determine the bullet's electric charge,including its algebraic sign (+ or -).
If the current in the circuit is 0.15 A and the resistances are R1 = 100 ? and R2 = 260 ?, what is the emf of the battery.
A motor pulls a ski tow rope moving 10 skiers at a time (each 75kg) up a slope of 20 degrees at a constant 2m/sec speed. find the minimum power the motor must have to accomplish this
q1. what are sunspots and how are they related to suns magnetic field? is a magnetic field stronger weaker in sunspots?
The fresh water behind a reservoir dam is 15.0 m deep. A horizontal pipe 2.50 cm in diameter passes through the dam 7.5 m below the water surface, What volume of water flows out of the pipe in 4.0 hours
consider two blocks of wood, one having mass of 1 kg and the other having a mass of 2 kg. What is the net force of the bottom block
a stable nucleus contains many protons very close to each other all positively charged. why do the protons not fly
When the knob of a certain radio tuning capacitor is turned, the effective area of the plates in the interleaved position is reduced from 40 cm^2 to 10cm^2, What is the ratio of initial to the final capacitance
A crate of mass 14.0 kg is pulled up a rough incline with an initial speed of 1.50 m/s. How much work is done by gravity
to help keep his barn warm on cold days a farmer stores 832 kg of solar-heated water lf 3.35e5 jkg in barrels. for how
A river flows due east with aspeed of 2.2 m/s. A man steers amotorboat across the river. His velocity relative to the water is3.9 m/s due south. What is his velocity relative to the earth
q1. a vaulter holds a 31.67-n pole in equilibrium by exerting an upward force u with her leading hand and a downward
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.54 g and a charge of magnitude q. Find the magnitude of the charge on the balls
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