Explanation: you will nee to divide 300 divided by 10 and you will have your answer but be sure to add m/s at the end of the problem......
This link should help you out https://quizlet.com/40330134/biomechanics-questions-flash-cards/
It has three significant figure
Quantity of Charge , Q = ne
Where n = number of electrons
e = charge on one electron = -1.6 * 10 ^-19 C.
n = 50 * 10^31 electrons
Q = (50 * 10^31)*( -1.6 * 10 ^-19 ) = -8 * 10^13 C.
Note that the minus sign indicates that the charge is a negative charge.