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A neodymium-glass laser emits short pulses of high-intensity electromagnetic waves. The electric field of such a wave has an rms value of Erms = 6.00 109 N/C. Find the average power of each pulse that passes through a 1.70 10-5 m2 surface that is perpendicular to the beam.
Calculate the torque required to accelerate the Earth in3days from rest to its present angular speed about its axis. Calculate the average power required
q1. a box of mass 32 kg is at rest on a horizontal frictionless surface. a constant horizontal force then acts on the
q1. consider a motor that exerts the constant torque of 25.0 n cdot m to a horizontal platform whose moment of inertia
Two spherical asteroids have the same radius R. Asteroid 1 has mass M and asteroid 2 has mass 2M. What is the speed of each asteroid just before they collide
The plates have sides of length L = 0.810 m. One of the plates has charge Q= + 2.62×10-6 C, while the other plate has charge -Q. Calculate the magnitude of the electric field between the plates, not close to the edge
A car is traveling at 27 m/s when the driver spots a large pothole in the road a distance 44 m ahead. She immediately applies her brakes. If her acceleration is -9.7 m/s2, does she arrange to stop before reaching the pothole.
In this simulation you can choose between seven possible circuits by clicking on one of the small circuit diagrams shown at the upper right. What is the maximum possible total current that can be obtained in this simulation
Three point charges, -4.9 x 10-9 C, -9.7 x 10-9 C, and +7.1 x 10-9 C, are fixed at different positions on a circle. What is the radius of the circle
When resting, a person has a metabolic rate of about 3.0 105 joules per hour. The person is submerged neck-deep into a tub containing 1.12 103 kg of water at 22.10° C. find the water temperature after half an hour
For each part of the following, state any assumptions used and show mathmatical dereviation before using values. determine the rotential inertia of a yo-yo about it's center
In a certain binary-star system, each star has the a mass of 1.00 multiply.gif 10^30 kg, What is their period of revolution in Earth years
A 84.3-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.67 rad/s. Find the angular velocity of the platform with its load
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