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A uniform electric field of magnitude 355 N/C pointing in the positive x-direction actos on an electron, which is initially at rest. The electron has moved 3.40 cm.
A 0.450-kg ball is dropped from rest at a point 1.30 m above the floor. The ball rebounds straight upward to a height of 0.700 m. What are the magnitude and direction of the impulse of the net force
The intensity of a particular earthquake wave is measured to be 4.0 106 J/m2·s at a distance of 49 km from the source. What was the intensity when it passed a point only 7.0 km from the source?
You are given a vector in the xy plane that has a magnitude of 84.0 units and a y component of -53.0 units. What are the two possibilities for its x component?
You fire a gun horizontally that is 25.0 m off the ground and the bullet goes at 200.0 m/s. What is the time it takes for the bullet to hit the ground, how far down range does the bullet travel, and
The bright fringes are found to be separated by a distance of 0.1 mm. Planck's constant is 6.63 × 10 -34 J · s. What is the kinetic energy of the electrons in the beam? Answer in units of
Imagine a frictionless pulley (a solid cylinder) of unknown mass M and radius r = 0.200 m which is used to draw water from a well. A bucket of mass m = 1.50 kg is attached to a massless cord wrapped
Water in a 0.310 kg iron pot initially at 19.3oC. If the final equilibrium temperature is 24.8oC, calculate the initial temperature of the hot horseshoe.
The average force exerted on him by the ground is +18000 N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting
The loop is in a uniform magnetic field of magnitude 89.0 mT whose direction is parallel to the current in the 130 cm side of the loop. What are the magnitude of the magnetic forces on each of the t
A block of mass 6.2 kg is pulled along a horizontal frictionless floor by a cord that exerts a force of 42.0 N at an angle 22.4° above the horizontal. What is the magnitude of the acceleration
A circular loop in the plane of the screen lies in a 0.72 T magnetic field pointing into the screen. The loop's diameter changes from 18.5 cm to 6.0 cm in 0.50 s. What is the magnitude of the averag
On a very muddy football field, a 110 kg linebacker tackles an 85 kg halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.6 m/s north and the halfback is slidi
What are the minimum dimensions for the rear-view mirror if the driver is to be able to see the entire width and height of the rear window in the mirror without moving her head?
Metabolizing a candy bar releases about 106 joules. How fast must the candy bar travel to have the same 106 joules in the form of kinetic energy? (Assume the candy bar's mass is 0.2 kg.)
Suppose the needle moves 8.2 mm from its highest to its lowest position and it makes 27 stitches in 8.5 s. What is the maximum needle speed?
A point charge 9.00 {rm nC} is at the center of a cube with sides of length 0.180 {rm m}. What is the electric flux through the surface of the cube?
You're carrying a 3.6m long, 25kg pole to a construction site when you decide to stop for rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip. Ho
A 63 kg swimmer jumps off a 9.5 m tower. The swimmer comes to a stop 2.0 m below the surface. Find the net force exerted by the water.
You can determine the speed of a moving bullet by allowing the bullet to pass through two rotating paper disks mounted a distance.
Two meters from the left end is the 500 N washing equipment. Joe is 0.500 m from the right end and weighs 920 N. Given that the scaffold is in rotational and translational equilibrium, what are the
A car traveling at a constant speed of 18.5 m/s passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets off in chase with a constant acce
A 52 kg box is being pushed a distance of 7.0 m across the floor by a force vector P whose magnitude is 165 N. The force vector P is parallel to the displacement of the box. The coefficient of kinet
What are the magnitude and direction of the electric field 12.0 cm directly above an isolated 45.9 10-6 C charge? 1 N/C 2 ---Direction--- away from the positive charge neither of these toward the posi
A conducting coil of 1800 turns is connected to a galvanometer, and the total resistance of the circuit is 50.0. Find the magnitude of the magnetic field.