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In the Bohr theory of the hydrogen atom, an electron moves ina circular orbit about a proton. The radius of the orbit is0.53*10^-10m.
a) Find the electrostatic force acting on each particle.
b) If this force causes the centripetalacceleration of the electron, what is the speed of the electron?
A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, How deep is the hole
A(n) 150 pF capacitor is connected in series with an unknown capacitor, and as a series combination they are connected to a 23.0 V battery, what is the unknown capacitance
An RL circuit has a 5 kO resistor and a 1 mH inductor. This circuit is driven by a 100 Hz sine wave with 1 V amplitude. What is the amplitude of the current in the circuit
The angular momentum of a flywheel having a rotational inertia of 0.250 kg·m2 about its central axis decreases from 2.80 to 1.800 kg·m2/s in 1.00 s. What is the average power of the flywheel
A sprinter running the 100 m dash has a constant acceleration of 2.8 m/s2 for the first 4.1 seconds of the race, when he reaches his top speed, and then continues to run at that speed for the rest of the race. How long does it the sprinter to run t..
1.50-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 5.60sin(2?t), FIND THE AMPLITUDE OF THE MOTION
A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.16 s). what average force does the punter exert on the ball
What is the direction of proton after the collision? What is the direction of carbon atom after the collision.
Two astronauts are at rest in outer space, one 12.1 m from the Space Shuttle and the other 24.2 m from the Shuttle. Using a 151.0-W laser, how long will it take her to reach the Space Shuttle
A very long uniform line of charge has charge per unit length 4.80x10^-6 and lies along the x-axis. A second long uniform line of charge has charge per unit length -2.40*10^-6 and is parallel to the x-axis at y=0.400m.
A thin uniform rod (length = 10.0 cm, mass = 250 g) is pivoted about a horizontal frictionless pin through one end of the rod
The longest stuffed toy ever manufactured is a 420 meter snakemade by Norwegian children. What would be the projectile's initial speed
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