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A long, thin rod (length = 4.0m) lies along the x axis, with its midpoint at the origin. In a vacuum, a +8.0 μC point charge isfixed to one end of the rod, and a -8.0 μC point charge isfixed to the other end. Everywhere in the x, y plane there is aconstant external electric field (magnitude = 5.0 X103 N/C) that is perpendicular to the rod. With respect to the z axis, find the magnitude of the net torque appliedto the rod.
A moving 3.30kg block collides with a horizontal spring whose spring constant is 261 N/m.What is the speed of the block when it hits the spring
A golf ball strikes a hard, smooth floor at an angle of 22.1 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.0342 kg, and its speed is 47.5 m/s just before and after striking the floor
One of the loudest sounds in recent history was that made by the explosion of Krakatoa on August 26-27, 1883. what was the decibel level on Rodriguez Island
An astronaut with a steady heartbeat of 57 beats per minute travels at a constant speed of 0.91c, relative to earth. what was the heart rate
A solenoid of length 4.0 cm and diameter 0.93 cm is wound with 165 turns per cm. What is the induced emf in one of the windings
A laboratory technician drops a 0.0770-kg sample of unknown material, at a temperature of 100.0°C, into a calorimeter. The calorimeter can, initially at 23.0°C, is made of 0.150 kg of copper and contains 0.200 kg of water. The final temperature of th..
A student has built a 20-cm-long pinhole camera for a science fair project. She wants to photograph the Washington Monument, How far should she stand from the Washington Monument
You are driving south on a highway at 28 (approximately 63 ) in a snowstorm. Estimate the speed of the snowflakes relative to the car
You throw a glob of putty straight up toward the ceiling, which is 3.00m above the point where the putty leaves your hand. What is the speed of the putty just before it strikes the ceiling
Write down the complete hamiltonian of the helium atom in SI units and atomic units. Identify, with an explanation, the term in the hamiltonian which makes it nonseparable.
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
A column of soldiers, marching at 137 steps per minute, keep in step with the beat of a drummer at the head of the column. It is observed that the soldiers in the rear end of the column are striding forward with the left foot when the drummer is a..
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