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A 499-m long spaceship passes by an observer at the speed of 2.40x108 m/s. What length does the observer measure for the spaceship?
A uniform solid sphere of radius R = 0.50 m and a mass 15 kgrotates about the z-axis through its center. Find its angular momentum when the angular velocity is 3 radians/second
An electron is released from rest at the negative plate of a parallel plate capacitor. How fast is the electron moving just before it reaches the positive plate
A 1.0 µCi 13755Cs source is used for 2.3 hours by a 80 kgstudent in a physics lab. Radioactive 13755Cs decays by ß- decay with a half-life of 30 years. The average energy of the emitted betas is about 190 keV per decay. The ß decay is quickly foll..
A 11.0nC point charge is at the center of a 2.50m× 2.50m × 2.50m cube. find the electric flux through the top surface of the cube
An electric field given by E→ = 8.3 iˆ - 9.4(y2 + 8.5) jˆ pierces the Gaussian cube of edge length 0.490 m and positioned as shown in the figure. What is the net electric flux through the cube
A large person sits on a four-legged chair with his feet off the floor. find what pressure does each leg exert on the floor
When Skylab recentered the Earth's atmosphere on July 11,19790, it broke into a m,yraid of pieces. What was the kinetic energy of the film vault when it landed
An airplane has a mass of 1.40 104 kg, and each wing has an area of 33.0 m2. Determine the pressure on the upper wing surface
Three positive charges are arranged as shown at the corners of a rectangle. Find the magnitude of the electric field at the fourth corner of the rectangle. The value of the Coulomb constant is 8.98755 x 10^9 N.m^2/C^2. Answer in units of N/C. What..
The pilot of an airplane executes a constant-speed loop-the-loop maneuver in a vertical circle, What is his apparent weight at the highest point of the circle
A tennis ball is hit vertically upward with a speed of 21.0 m/s from the roof of an office building that is 275 feet above the ground. How long after being hit does the ball strike the ground? (Answer in seconds please)
Doug hits a hockey puck, giving it an initial velcoity of 6.0 m/s. how far will the puck slide before stopping
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