In a hydrogen atom an electron rotates around a stationary proton in a circular orbit with an approximate radius of r =0.053nm. (a) find the magnitude of the electrostatic force of attraction, fe between the electron and the proton. (b) find the magnitude of the gravitational force of attraction fg , between the electron and the proton, and find the ratio, fe /fg . me = 9.11 x 10-31kg, e = 1.602 x 10-19c mp = 1.67 x 10-27kg k = 9 x 109 nm2 /c2 g = 6.67 x 10-11 nm2 /kg2
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Physics, 22.06.2019 10:30
Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.
Answers: 3
Physics, 22.06.2019 12:00
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Answers: 1
Physics, 22.06.2019 16:00
In which of the following is positive work done by a person on a suitcase
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In a hydrogen atom an electron rotates around a stationary proton in a circular orbit with an approx...
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