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A beam of electrons is moving through a region of space in which there is an electric field of intensity 3.4 x 104 V/m and a magnetic field of 2.0 x 10-3 T. The electric and magnetic fields are so oriented that the beam of electrons is not deflected. The velocity of the electrons is approximately:
a) 1.7 x 107 m/s
b) 6.8 x 106 m/s
c) 3.0 x 108 m/s
d) 6.0 x 10-9 m/s
An infinite plane of charge with surface charge density ?1 = 3.7 µC/m2 is parallel to the xz plane at y = -0.8 m. A second infinite plane of charge with surface charge density ?2 = -1.1 µC/m2 is parallel to the yz plane at x = 1 m.
A 237 kg cart runs into the rear end of a 120 kg cart that is stationary. What is the speed of the moving cart before the collision
A massless spring hangs from the ceiling with a small object attached to its lower end. The object is initially held at rest in a position yi such that the spring is at its rest length. The object is then released from yi and oscillates up and dow..
You have invented a new game and are playing it with your friends. You have a projectile launcher that fires a brick (mass=2 kg) with a speed and angle that you can adjust. What is the work done by friction during the block's motion
If a lab student determines the coeffient of linear expansion of aluminum is 26.4 x 10-6, what is that student's percent error for the experiment
A device used in radiation therapy for cancer contains 1.40 g of cobalt 2760Co (59.9333819 u). Determine the activity of the radioactive material
A child's top is held in place, upright on a frictionless surface. The axle has a radius of r= 2.21 mm. Two strings are wrapped around the axle, How much angular momentum does the top acquire
Starting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric force on the top left charge due to all the other charges
Physics - Classical Mechanics - Inclined Plane, A packing crate is placed on a plane inclined at an angle of 350 from horizontal. If the coefficient of static friction
Two charges are placed on the x axis. One charge (q1 = +8.97mC (microC)) is at x1 = +3.40cm, Calculate the net electric field at x = 0cm
Water moves into a pipe of cross sectional area 0.5m2 at a rate of10m/s. at a pressure of 10,000kPa. Determine the mass rate of flow of the water. The duct necks down to a cross-sectional area of 0.2m2. Determine the velocity in this cross-section.
An artillery expert fires a cannonball at an angle of 36.87o at an enemy encampment sitting on a plateau 40 m high and 300 m horizontally from the cannon. How long was the cannonball in the air
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