Link provided in other answer is a SCAM, don’t click on the link !!!!
Answer:
a) 500 m
b) 50 s
c) speed= distance/time= 500/50= 10 m/s
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D. Rutherford found that the atom consists of a small positively charged nucleus.
Answer:
F1 = k Q1 * Q2 / R^2
If Q1 is doubled then F2 = 2 F1 = 72 units
