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In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.19 106 m/s.
(a) Find the force acting on the electron as it revolves in a circular orbit of radius 0.528 ? 10?10 m.
(b) Find the centripetal acceleration of the electron.
A 70kg man walks out on a 10kg beam that rests on, but is not attached to, two supports. When beam just starts to tip, what is the force exerted on the beam by the right support.
If 20 grams of hot water at 80 C is poured into a cavity in a very large block of ice at 0 C, what will be the final temperature of the water in the cavity? How much ice should melt in order to cool the hot water down to this temperature.
One fragment, whose speed immediately after the explosion is zero, falls vertically. Illustrate what is the horizontal speed of the other fragment?
Why is surface wind always directed at some angle across sea-level isobars toward lower pressure? Why is the surface wind directed across the sea-level isobars at a greater angle in Madison than over the middle of Lake Michigan.
find the ratio of vb to vr, where vr is defined above and vb is the boats speed with respect to the water.
a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 211 m, What are the acceleration of the green car
What is a quantum well: give an example of structure, growth method to make quantum wells and quantum states i.e. outline quantization using diagrams
A 5.00 g charged insulating ball hangs on a 27.0 cm long string in a uniform horizontal electric field. Given the charge on the ball is 2.00 ?C , find the strength of the field. The angle that the string makes with the vertical is 8.00° N/C.
Consider purchasing a new tire with a warranty of 6.4 x 10^7 meters. Calculate the thickness of the tread that will be worn away with each revolution of the tire
A glass soda bottle is emptied of soda and filled to the very top with water. A cork is carefully fitted into the top of the bottle, leaving no air between the cork and the water.
A rowboat crosses a river with a velocity of 3.51 mi/h at an angle 62.5° north of west relative to water. The river is 0.8 mi wide and carries an eastward current of 1.25 mi/h. How far upstream is the boat when it reaches the opposite shore.
An object with a charge of 0.980 µC is placed at the center of a regular icosahedron with 20 equivalent surfaces. What is the electric flux through one surface of the icosahedron?
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