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Some of the earliest atomic models held that the orbital velocity of an electron in an atom could be correlated by the radius of the atom. If the radius of the hydrogen atom is 5.29*10-11 m and the electrostatic force is responsible for the circular motion of the electron, what is the kinetic energy of this orbital electron?
a proton moving at a constant velocity of 106 ms enters a region of uniform magnetic field perpendicular to its
sled is being pulled across a cement sidewalk at constant velocity. the coefficient of friction mu between the cement
During a baseball game, a batter approaches the plate. The pitcher hurtles the ball in the direction of the batter at a speed of 85 miles per hour. What is the relative velocity of the system immediately after the collision
A person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the deceleration does not surpass 27.0 "g's"(1.00 g= 9.80m/s2).
Ignoring the container and the equilibrium vapor pressure of the liquid at 51.5 °C, find out the ratio of the mass of steam to the mass of ice. The specific heat capacity of steam is 2020 J/(kg C°).
A model train moves along a horizontal circular track with a radius of 0.5 m. Starting from rest, What is the angular acceleration (in rad/s2) of the train
A horizontal force of 12 N pushes a .5 kg book against a vertical wall. The book is initally at rest. compute the magnitude of the frictional force
When two identical ions are separated by a distance of 8.3x10^-10m and the electrostatic force each exerts on the other is 5.3x10^-9N How many electrons are missing from each ion
Two carts of equal mass, m = 0.280 kg, are placed on a frictionless track that has a light spring of force constant k = 47.6 N/m attached to one end of it, Find the magnitude of the velocity of the blue cart just after the first collision
A silver coin has the mass of 17.75g. If the atomic mass of silver is 107.868u, how many silver atoms are in the coin
A solid disk of mass m1 = 9.1 kg and radius R = 0.25 m is rotating with a constant angular velocity of ? = 33.0 rad/s. What average torque was exerted on the rod by the disk
A generator rotates at 88Hz in a magnetic field of 2.6×10?2T . It has 1200 turns and produces an rms voltage of 120V and an rms current of 57.0A, What is the area of each turn of the coil
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