Answer:
E=0.5 m v^2
2*10^-5 = 0.5 1000*v^2
4*10^-5=1000v^2
4*10^-8=v^2
2*10^-4 =v
Answer:7.5j
Explanation:
P=w/s
Answer: 4 times as much
20m
420=80m
100
increases
increases then decreases
A flame always point upwards because the flame's gas is hotter than the surrounding air and, like you said, a hot gas is always lighter or less dense than a cold gas.
