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Two very thick equally-magnetized square plates of side 0.23m and of mass 20 g, are hung by threads 20.0 cm long from a common point. The plates repel and deflect from each other through a very small angle.
a) Calculate the B field between the two plates, if the distance between them is 0.123 cm?
b) Calculate the magnetic field energy stored between the two plates.
What is the vertical force on the support closest to the piano.
A .450 kg ice puck, moving east with a speed of 3m/s, has a head-n collision with a .900 kg puck initially at rest. Assume a completely elastic collision, what will be the speed and direction of each object after collision.
Determine the tension in an elevator cable if the 2000 kg elevator is accelerating upward with an acceleration of 1.8 m/s^2
When a guitar string is sounded along with a 439 Hz tuning fork, a beat frequency of 2.00 Hz is heard. What is the frequency of the string
A car travels along a straight line at a constant speed of 58.5 mi/h for a distance d and then another distance d in the same direction at another constant speed.
When people sleep, their metabolic rate is about 2.6 x10-4 C/(s.kg). How numerous Calories does a 69 kg person metabolize while sleeping 9 hours.
An Argon ion laser has a gain bandwidth of 2 GHz. Find the number of standing wave cavity modes within the gain bandwidth of the argon ion laser
Two point charges 1.9cm apart have an electric potential energy -150?J . The total charge is 30nC
What is the temperature of the outside air. What are the components of the displacement vector from camp to summit? What is its magnitude? select the x axis east, y axis north, and z axis up.
A 4 kg mass is hung from a string which is wrapped around a cylindrical pulley (a cylindrical shell). If the mass accelerates downward at 4.90 m/s2, what is the mass of pulley.
A solid sphere of radius 10 m and mass 2.5 kg rolls down a ramp that is 3 m high. What is its velocity at the bottom of the ramp
A certain spring is found not to obey Hooke's law; it exerts a restoring force Fx(x)=??x??x2 if it is stretched or compressed, Calculate the potential energy function U(x) for this spring. Let U=0 when x=0
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