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Consider a model of a hydrogen atom in which an electron is in a circular orbit of radius = 5.79×10?11 around a stationary proton. What is the speed of the electron in its orbit?
A distant galaxy is moving away from the earth with a speed that results in each wave- length received on the earth being shifted, Find the speed of the galaxy relative to the earth
or a given initial projectile speed, For what other launch angle will the projectile have the same range
A cyclotron (see figure below) designed to accelerate protons has an outer radius of 0.333 m. Find the speed at which protons exit the cyclotron
A jumper in the long-jump goes into the jump with a speed of 12m/s at an angle of 20 deg above the horizontal. How long is the jumper in the air
a -58 nC charge is distributed uniformly along the x-axis from x = -1.3 m to x = 3.4 m. Consider a point at y = 2.2 m on the y-axis. a) what is the x-component of the electric field at the point
A hunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20g bullets at 960m/s. Find the recoil velocity of the hunter if he fires the rifle horizontally
The merry-go-round is moving at a speed of 0.3 rev/sec when it shuts down. find the initial angular velocity of the merry-go-round
An RL circuit has a V=7V battery, a R=15000Ohm resistor, and a L=0.7H, connected in series with a switch. The switch is left open for several seconds and then closed at time t = 0.
You notice you are running low on gas in your 1200kg car, and you are hoping you have enough gas to reach the bottom of the hill. what will your speed be at the bottom of the hill
When a mass of 7.15 kg is attached to the spring, the spring stretches by 0.0105 m. Calculate the kinetic energy the mass possesses
An electron moves at a speed of 14000 m/s in a circular path of radius 2.4 cm in a solenoid. Find the strength of the magnetic field inside the solenoid
To throw the discus, the thrower holds it with a fully outstretched arm. Starting from rest, he begins to turn with a constant angular acceleration, what will be the speed of the discus at release
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