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In the Bohr model, as it is known today, the electron is imagined to move in a circular orbit about a stationary proton. The force responsible for the electron's circular motion is the electric force of attraction between the electron and the proton
If the speed of the electron were 1.1×106m/s , what would be the corresponding orbital radius?
How close to the edge of the 28.0 kg table, that is 2.2m with legs 1.2m apart, can a 62.0 kg person sit without tipping it over.
A bat flying in complete darkness emits high frequency sound of 100 kHz to locate objects. What is the frequency in which the bat is received
A child exerts a tangential 47.6 {N} force on the rim of a disk-shaped merry-go-round with a radius of 2.10 {m}. If merry-go-round starts at rest and acquires the angular speed of 0.080 {rev/s} in 3 {s}, what is its mass.
Two resistanceless rails 32 cm apart rest on a 6.0° ramp. They are joined at the bottom by a 0.63 resistor, What is the terminal (steady) velocity of the bar as it slides frictionlessly down the rails
Wanting to invite Juliet to his party, Romeo is throwing pebbles at her window with a launch angle of 73° from the horizontal, What is the initial speed of the pebbles
A cart of mass 1.91kg traveling 1.29m/s inelastically strikes a stationary mass of 0.41kg. What is the total momentum of the system
A golf ball with mass 45.90 g and diameter 42.60 mm is struck such that it is moving with a speed of 51.93 m/s, What is the kinetic energy of the golf ball
A disgusted physics student wads up her homework and throws it downward into a trash can. with what speed was the homework hurled
A small sphere with a charge of -5.9 10-7 C is placed in a uniform electric field of magnitude 1.9 106 N/C pointing to the west. What is the magnitude and direction of the force on the sphere due to the electric field?
A rifle is aimed horizonatally at a target 50 m away. The bullet hits the target 2.0cm below the aim point. what was the bullets speed as it left the barrel
Estimate the volume of your body. (Consider your body to be a cylinder having a radius of about 6 inches (or 0.15 m) and a height of about 1.5 meters
On a clear day the electric ?eld in the atmosphere near the earth's surface is 100 N/C, What is the potential at the top of a man's head if the man is 2 m tall and is standing
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