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The electric field of an electromagnetic wave in a vacuum isEy = (17.0 V/m)cos((6.28 ×108)x??t), where x is in m and t is in s.
1) What is the wave's wavelength?
2) What is the wave's frequency?
3) What is the wave's magnetic field amplitude?
Some rear view mirrors produce images of cars behind you that are smaller than they would be if the mirror were flat. What is the mirrors radius of curvature if cars 25.0 m away appear 0.33 times their normal size?
A snowball rolls off a barn roof that slopes downward at the angle of 40 ^circ. The edge of the roof is 14.0 {rm m} above the ground, and the snowball has a speed of 7.00 {rm m/s} as it rolls off the roof. Ignore air resistance.
If the string is 9.5 long, has a mass of 30 and is pulled taut with a tension of 8.50, how much time does it take for a wave to travel from one end of string to the other?
The dispersive power of crown and flint glasses are 0.03 and 0.05 respectively. If diffrence in the refractive indices for blue, calculate the angles of the two prisms for a deviation of 2 degree without dispersion
The two stick together and move off with a speed of 4.0 m/s. Evaluate what is the mass of the second car?
A 50 kg block and a 100kg block are connected by string. the pulley is frictionless and of negligible mass. the coefficient of kinetic friction between the 50kg block and incline is 0.250. find the change in the kinetic energy of the 50kg block as..
The coefficient of kinetic friction
Starting from rest, a 98 kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 800N, and his speed at the bottom of the pole is 3.2 m/s. How far did he slide down the pole.
What is the CD's moment of inertia for rotation about a perpendicular axis by the edge of the disk.
You place one end of the pole on a fence post and hold the other end of the pole 35 from its tip. Explain how much force must you exert to keep the pole motionless in a horizontal position
Two charges are placed on the x axis. One of the charges q1= +8.5 C is at x1 = + 3.0 cm and the other q2= -21C is at x1 = + 9.0 cm. Find the net electric field (magnitude and direction) at.
A 2 kg object is attached to a spring and placed on a horizontal, smooth surface. A horizontal force of 20.0 N is needed to hold the object at rest when it is pulled 0.200 m from its equilibrium position.
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