What is the escape speed for an electron initially at rest on the surface of a sphere with a radius of 1.7 cm and a uniformly distributed charge of 1.8 × 10-15 C? That is, what initial speed must the electron have in order to reach an infinite distance from the sphere and have zero kinetic energy when it gets there? The charge of an electron is 1.602 × 10-19 C and its mass is 9.109 × 10-31 kg.

Explanation:

We know that,

            Energy = .......... (1)

and,          Energy = ............ (2)

Now, equating both equations (1) and (2) as follows.

              =

                       v =

                          =

                          =

                           = m/s

or,                        = 18 km/s

Thus, we can conclude that initial speed the electron must have in order to reach an infinite distance from the sphere and have zero kinetic energy when it gets there is 18 km/s.

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.