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A proton, traveling with a velocity of 7.4 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 7.6 × 10-14 N and direction of due south. What are the magnitude and direction of the magnetic field causing the force? If the field is up, then enter a number greater than zero. If the field is down, then enter a number less than zero.
A bicyclist climbs a hill 17 m tall and then coasts down the other side without pedaling. If the cyclist's speed was 2.5 m/s at the top, what is it at the bottom (ignoring friction)?
A lead block is suspended from the underside of a 0.8 kg block of wood of density of 720 kg/m3. determine the mass of the lead block
Consider an infinite long metal table with a surface charge density of 2*10 C/m2. Use Gauss’ law to derive and expression for the electric field at a point P, 3 meters away from the table. You can assume that the table is thick.
A violinist is trying to tune her instrument to 512 Hz, but it is at 491. By what percent does she have to change the tension to tune the violin? Answer A) 1.2% B) 4.1% D) 8.7% E) 12.1% F) 14.5%
An electron moves with a velocity of 5 x 10^5m/s at an angle of 60 degrees with an eastward B field. The electron experiences a force of 3.2 x 10^-18N directed into the paper. What are the magnitude of B and direction of the velocity?
A skier is accelerating down a 30 degree hill at 2.00 m/s squared. what is vertical component of her acceleration
a moto-cross rider is airborn after a jump. Each wheel of his bike has a rotational intertia of .760 kg m2, What will his (bike and all) angular speed be after the wheel stops
A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. what is its activity (R) after it has been on the shelf for 2.0 h
A solid insulating sphere of radius a = 5 cm is fixed at the origin of a co-ordinate system as shown. The sphere is uniformly charged with a charge density ? = -312 ?C/m3. find the electric potential at the outer surface of the insulating sphere
What is the thinnest film of MgF2 n=1.39 on glass that produces a strong reflection for orange light with a wavelength of 600 nm.
There are four charges, each with a magnitude of 2.0 µC. Two are positive and two arenegative. The charges are fixed to the corners of a 0.33 m square, one to a corner, in such a way that the net force on any charge is directed toward the center o..
Two men lift a 45 kg block from the floor to a shelf 1.0 meter above the floor without accelerating the block. How much work is done by each man
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