In order to answer these questions, we need to know the charges on the electron and proton, and then we need to know the electron's mass. I'm beginning to get the creepy feeling that, in return for the generous 5 points, you also want me to go and look these up so I can use them in calculations ... go and collect my own straw to make the bricks with, as it were.
Elementary charge . . . . . 1.6 x 10⁻¹⁹ coulomb negative on the electron plussitive on the proton
Electron rest-mass . . . . . 9.11 x 10⁻³¹ kg
a). The force between two charges is
F = (9 x 10⁹) Q₁ Q₂ / R²
= (9 x 10⁹ m/farad) (-1.6 x 10⁻¹⁹C) (1.6 x 10⁻¹⁹C) / (5.35 x 10⁻¹¹m)²
= ( -2.304 x 10⁻²⁸) / (5.35 x 10⁻¹¹)²
= 8.05 x 10⁻⁸ Newton .
b). Centripetal acceleration =
v² / r .
A = (2.03 x 10⁶)² / (5.35 x 10⁻¹¹)
= 7.7 x 10²² m/s² .
That's an enormous acceleration ... about 7.85 x 10²¹ G's ! More than enough to cause the poor electron to lose its lunch.
It would be so easy to check this work of mine ... First I calculated the force, then I calculated the centripetal acceleration. I didn't use either answer to find the other one, and I didn't use " F = MA " either.
I could just take the ' F ' that I found, and the 'A' that I found, and the electron mass that I looked up, and mash the numbers together to see whether F = M A .
Make the angle of reflection and the angle of incidence equal.
The law of reflection states that at the point of incidence on a smooth surface, the angle of incidence is equal to the angle of reflection, The incident ray, the normal and the reflected ray lie on the same plane.
Sandy hears 8 such clicks every 3 seconds and a small twig, caught in the spokes, causes the tire to click once each revolution that means the wheel of the cycle is rotating at 8 rotations every 3 seconds or 8/3 rotation per second . In each rotation , it moves distance equal to its circumference .
circumference = 2π r = 2 x 3.14 x .65 / 2 m
= 2.041 m
In 8/3 rotation , distance covered = 8/3 x 2.041 = 5.44 m