What is the distance between mars and earth

-- Earth's average distance from the sun is about 93 million miles.

-- Mars' average distance around the sun is about 142 million miles.

-- So, as both planets travel in their orbits around the sun, the distance
between them changes, between (142 - 93) = about 49 million miles
and (142 + 93) = about 235 million miles.

91.87 m/s

Explanation:

Given:

x = initial distance of the electron from the proton = 6 cm = 0.06 my = initial distance of the electron from the proton = 3 cm = 0.03 mu = initial velocity of the electron = 0 m/s

Assume:

m = mass of an electron = v = final velocity of the electrone = magnitude of charge on an electron = p = magnitude of charge on a proton =

We know that only only electric field due to proton causes to move from a distance of 6 cm from proton to 3 cm distance from it. This means the electric force force does work on the electron to move it from one initial position to the final position which is equal to the change in potential energy of the electron due to proton.

Now, according to the work-energy theorem, the total work done by the electric force on the electron due to proton is equal to the kinetic energy change in it.

Hence, when the electron is at a distance of c cm from the proton, it moves with a velocity of 91.87 m/s.