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Which of the following is not true of all electromagnetic waves, only one answer is correct,
A. The electric and magnetic fields must be perpendicular to each other.B. the wave is a trasverse wave.C. Only wavelengths of 400 to 700 nm are allowed.D. In Vacuum, the speed of the wave is given by c. the speed of light.
Three point charges, -5.2 x 10-9 C, -8.1 x 10-9 C, and +7.7 x 10-9 C, are fixed at different positions on a circle. The total electric potential at the center of the circle is -2300 V
15.0kg stone slides down a snow-covered hill, leaving point A with a speed of 10.0m/s . There is no friction on the hill between points A and B, How far will the stone compress the spring
What is the speed of the runner. What is the total translational kinetic energy of gas molecules.
an initally stationary 15-kg crate of cheese wheels is pulled via a cable a distance d=5.70m up a frictionless ramp to a height of h=2.50m, what is the power rating of the lifting device
A 50.0kg crate is being pulle along a horizontal smooth surface. What is the magnitude of the normal force acting on the crate
A sled and rider with a combined weight of 59 kg are at rest on the top of a hill 10 m high. What is their total energy at the top of the hill
A box slides down a ramp between a delivery area and soring area. You must determine the angle this ramp should have with the horizontal direction so that a 500 pound box takes 5.0 seconds to slide down the ramp starting from rest at the top. While t..
the man and the platform together weigh 1200 N. The pulley can be modeled as frictionless. Elucidate how hard the man has to pull on the rope to lift himself steadily upward above the ground.
An electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate, What is the kinetic energy of the electron just as it reaches the positive plate
Calculate velocity of the skydiver of mass m=80kg as a function of time. The air drag coefficient D=100g/m=0.1kg/m.
An 18 mm wide diffraction grating has rulings of 710 lines per mm. What is the largest angle from the normal at which an intensity maximum is formed
q1. a juggler performs in a room whose ceiling is a height 3.0 m above the level of his hands. he throws a ball upward
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