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In the Bohr model of the hydrogen atom, an electron in the 1st excited state moves at a speed of 2.19 *10^6 m/s in a circular path having a radius of 5.29*10^-11 m. What is the effective current associated with this orbiting electron?
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Question: The surface charge density on an infinite charged plane is - 1.70 x 10^-6 C/m^2 . A proton is shot straight away from the plane at 2.20 x 10^6m/s. How far does the proton travel before reaching it's turning poi ...
Question: A semicircle of radius a is in the first and second quadrants, with the center of curvature at the origin. Positive charge +Q is distributed uniformly around the left half of the semicircle, and negative charge ...
A cheetah can run very quickly over short distances. Assume a cheetah has a constant velocity of 33.0 m/s and is approaching a gazelle that is initially at rest. When the cheetah is 90 m away, the gazelle begins to run w ...
Question: The potential difference between the surface of a 3.5 cmdiameter power line and a point 1.0 m distant is 3.6 kV. What is the line charge density on the power line? The response must be typed, single spaced, mus ...
Question: What is the potential difference across the 10 Ω resistor in the figure ? What is the potential difference across the 20 Ω resistor in the figure?
Question: Resistor color codes: What is the resistance of a resistor with the band colors Green Blue Brown? What is the resistance of a resistor with the band colors Red Green Black? What colors would you see on a 75 k o ...
Question: An outfielder throws a 0.150 kg baseball at a speed of 40.0m/s at an intial angle of 30.0 with respect to the horizontal. a) what is the kinetic energy of the baseball at the highest point of its motion? b) wha ...
A woman wishing to know the height of a mountain measures the angle of elevation of the mountaintop as 12°. After walking 1.23 km closer to the mountain on level ground, she finds the angle to be 15.8°. Find the height o ...
Question: A solid disk of mass m1 = 9.6 kg and radius R = 0.24 m is rotating with a constant angular velocity of ? = 30 rad/s. A thin rectangular rod with mass m2 = 3.4 kg and length L = 2R = 0.48 m begins at rest above ...
Question: A point charge with charge q1 is held stationary at the origin. A second point charge with charge q2moves from the point (x1, 0) to the point (x2, y2). Please use k for Coulomb's constant rather than writing it ...
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