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An electron is accelerated from rest through a potential difference that has a magnitude of 2.90 × 107 V. The mass of the electron is 9.11 × 10-31 kg, and the negative charge of the electron has a magnitude of 1.60 × 10-19 C.
(a) What is the relativistic kinetic energy (in joules) of the electron?
(b) What is the speed of the electron? Express your answer as a multiple of c, the speed of light in a vacuum.
A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates, Determine the work done by the net external force acting on the skier
What is the power output in horsepower of an electric motor turning at 4550rev/min and developing a torque of 4.75N, Calculate the angular momentum of a solid uniform sphere
You shoot an arrow into the air. Two seconds later arrow has gone straight upward to a height of 30 meters above its launch point. a) What was the arrow's initial speed? b) How long did it take for the arrow to first reach a height of 15 meters ab..
A 1.1-pF parallel plate capacitor has a potential difference of 12.0 V across it. The plates are 4.5 mm apart, and the space between them contains air. obtain the charge on the capacitor
Using the Equation of Hydrostatic Equilibrium, show that if we measure the pressure at the base of the atmosphere, Use the answer in the previous part to write an expression for the total mass of Earth's atmosphere
A basketball rolls without slipping down an incline of angle?. The coefficient of static friction is?s. Model the ball as a thin spherical shell. Find the acceleration of the center of mass of the ball
The edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. Find the pitch of the micrometer. If the number of divisions on the circular scale is 50, calculate the least count of the micrometer. U..
what force is needed to pull a 150 pound sled along a horizontal surface? The coeficient of kinetic friction is 0.10 and the sled is pulled by a rope that makes the angle of 0 degree with the horizontal. There is no acceleration.
A sphere, a solid cylinder and a thin-walled hollow cylinder all have the same mass and radius. Which one reaches the bottom of the incline first
A skateboarder shoots off a ramp with a velocity of 5.7 m/s, directed at an angle of 53° above the horizontal. how far is this point horizontally from the end of the ramp
Point charges of 6.2*10^-8 C and -6.4*10^-8 C are placed 72 cm apart. A third point charge of 6.3*10^-8 C is placed half way between the first two point charges
Radioactive isotopes frequently occur together in mixtures. Assume a 400g sample contains, with a half-life of 12 days, and, with a half-life of 4.5 days. If there are firstly twice as many calcium atoms as there are barium atoms, what will be the ra..
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