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Earth's radius is 6.38 × 106 m, and it completes one revolution every day. What is the tangential speed of a person standing on the equator?
A ray of light strikes a plane mirror perpendicular to the mirror. What is the angle of reflection
calculate the magnitude of the repulsive electric force between two protons packed together in an atomic nucleus, assuming that their separation is fixed at 2.4x10^-15m.
A spaceship of mass 2.3×106 is cruising at a speed of 5.6×106 when the antimatter reactor fails, blowing the ship into three pieces. One section, what is the direction of the third piece
q1. an electron with a speed of 3.28 times 108 cms in the positive direction of an x axis enters an electric field of
High-speed stroboscopic photographs show that the head of a 240 g golf club is traveling at 44 m/s just before it strikes a 46 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
For 140 keV gamma rays, the mass attenuation coefficients for hydrogen and oxygen are 0.26 and 0.14 cm^2/g, respectively. What is the mean free path in water at this energy
An object of mass 5.26 kg is released from rest and drops 1.95 m to the floor. The collision is completely inelastic. How much kinetic energy is lost during the collision
if there were two kinds of electrons, you could put 4, not just 2, in a given state. what would be the atomic number of the third largest inert gas in such a world
A cork ball of mass 1.20 g is placed between two very large horizontal planes of charge. The bottom plane has a uniform charge density of +0.68 uC/m2, What is the charge on the ball
question1on a humid day the electric field of 2.00times104 nc is enough to produce sparks about an inch long. assume
a 70kg person stands on a diving board 4m long. the boards mass is 25kg and is bolted to two supports. calculate the force on the board at each of the supports
At rush hour, the noise from a highway is 10^?4W/m^2 with 100 cars passing a given point a minute. How many cars are now driving on the highway
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