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A spacecraft is moving past Earth with a velocity of 0.7c. It launches a rocket that moves in the same direction as the spacecraft at a speed of 0.8c. What is the speed of the rocket relative to Earth?
A vertical scale on a spring balance reads from 0 to 195 rm{N}. The scale has the length of 11.5 rm{cm} from the 0 to 195 rm{N} reading. A fish hanging from the bottom of spring oscillates vertically at a frequency of 2.30 rm{Hz}. What is the m of..
The contains 410 turns and has an area per turn of 3.1 x10-3 m2. The magnetic field is 0.23 T, andthe current in the coil is 0.26 A. What is themagnitude of the minimum normal force
A projectile is fired with an initial speed of 68.8 at an angle of 37.8 above the horizontal on a long flat firing range. Find out the maximum height reached by the projectile.
How much horizontal force should a sprinter of mass 57.0 exert on the starting blocks to produce this acceleration.
A hollow spherical conductor, carrying a net charge +Q, has inner radius r[1] and outer radius r[2] = 2r[1]. At the center of the sphere is a point charge +Q/2. (a) Write the electric field strength E in all three regions as a function of r.
A spaceship with an earth weight of 3430 N is sent to Mars, which has radius, RM = 3.40 × 106 m, Find the weight of the spaceship on the Martian surface
One lens of a nearsighted person's eyeglasses has a focal length of -21.7 cm, and the lens is 1.70 cm from the eye. what should be the focal length of the corresponding contact lens
a circular coil has 200 turns a radius of 3.0mm and a current of 2.0a. if a proton is placed at the center of the coil
Jason takes off from rest across level water on his jet-powered skis. The combined mass of Jason and his skis is 75 kg, What is Jason's top speed
A rail gun accelerates a projectile from rest by using the magnetic force on a current-carrying wire. The wire has radius r = 4.3 10-4 m and is made of copper having a density of ? = 8960 kg/m3. Calculate the final speed of the wire as it leaves th..
In the figure below, a nonconducting rod of length L = 7.50 cm has charge -q = -4.68 fC uniformly distributed along its length. What is the linear charge density of the rod?
A photon with wavelength 4 x 10^-15m converts to a muon/antimuon pair. The rest mass energy of the muon and the antimuon is 105.7 Mev. find the combined kinetic energy of the muon and antimuon
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