An electron has an initial speed of 4.18 x 10^5 m/s.
If it undergoes an acceleration of
3 x 10^14 m/s^2, how long will it take to reach
a speed of 5.19 x 10^5 m/s?
Answer in units of s.
How far has it traveled in this time? Answer in units of m.

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

The discovery of the electron as a subatomic particle was a result of

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?