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Four point charges 2q, q, q, and q are placed at the corners of a rectangle of dimensions a and 3a as shown in the figure. A fifth charge Q is placed at the center of the rectangle. Our task is to compute the force on Q, where a = 2 cm, q = 3 µC, and Q = 4 µC.
A driver is traveling at 72 km/hr when she sees a red light in the distance. She keeps traveling at this speed for two seconds, and then applies the brakes, decelerating the car to a stop at a rate of -5 m/s2. Compute her total stopping time, measure..
A boy slides down a toboggan with an acceleration of 2.0 meter per second. If he starts at rest, obtain how far did she travel in 1.0 second
Determine the tension T in the string.
A drop of water on a countertop reflects light from a flower held 2.2 cm directly above it. What is the focal length of the water drop
A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. how many antinodes are in the standing wave
A 0.954-kg toy car is powered by three D cells (4.50 V total) connected directly to a small DC motor. What is the average current supplied to the car\'s motor
two racing boats set out from the same dock and speed away at the same constant speed of 86.0 kmh for half an hour
An astronaut measures her mass by means of a device consisting of a chair attached to a large spring. what is the mass of the astronaut and chair
Net average force using the concepts of Newton’s second law.
A box of unknown mass is sliding with an initial speed vi = 5.90 m/s across a horizontal frictionless warehouse floor when it encounters a rough section of flooring d = 2.10 m long. The coefficient of kinetic friction between the rough section of ..
Students used a 12-sided rotating mirror in an experiment similar to Michelson's to determine the speed of light was 2.88x108m/s.
You are visiting a pizza parlor and watch the chef make a pizza crust. He throws a spinning disk of dough in the air. Its angular velocity is 15 rad/s. What is the final rotational kinetic energy of the dough
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