The answers to this question is the 4th one
Start with the equation:
Rearrange the equation for time to get:
Distance = 300
speed = 20
Insert into the new equation:
15 seconds is your answer
Answer:
The energy required to accelerate an electron is 0.582 Mev and 0.350 Mev.
Explanation:
We know that,
Mass of electron
Rest mass energy for electron = 0.511 Mev
(a). The energy required to accelerate an electron from 0.500c to 0.900c Mev
Using formula of rest,
(b). The energy required to accelerate an electron from 0.900c to 0.942c Mev
Using formula of rest,
Hence, The energy required to accelerate an electron is 0.582 Mev and 0.350 Mev.
It would be metric
this is the most popular, or most famous technique of measuring(In USA)
hope that this helps you! =)