Answer:
áp dụng công thức v = s/t
s là dộ dài qduong
v là vận tốc
t là thời gian
xuyên suốt 2 câu hỏi đều dùng công thức này
Explanation:
C. Insulator
It COULD be semi-insulator but i'm sure its C
E, 63% of the value. I forget the rationale behind it but I learnt that in engineering. 90% confident for that answer.
Yes a kg of hydrogen will have more atoms than a kg of lead, because lead has a higher atomic mass, than hydrogen so it will take more atoms of hydrogen to make a kg than lead
