Answer:124.86 ib/cu ft
Explanation:
Answer:
its 2 g cm^-3
density = mass / volume
120 g / 60 cm^3 = 2 g cm^-3
Answer:1
Answer:J.J. Thomson, he was using a high-vacuum cathode-ray tube
Explanation:(I Googled it)
4 significant digits
Zeroes placed between other digits are always significant