Assuming no friction form air, how far will a dropped rock fall in 10 seconds
1 answer:
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Answer:
539.19 m/s , 459.83 m/s , 2156.78 m/s
Explanation:
The formula for the rms speed is given by
Where, R be the gas constant, T be the absolute temperature and M be the molecular mass of the gas
R = 8.314 in SI units
T = 100°C = 100 + 273 = 373 K
For Oxygen:
M = 32 g = 0.032 kg
vrms = 539.19 m/s
For carbon di oxide:
M = 44 g = 0.044 kg
vrms = 459.83 m/s
For hydrogen:
M = 2 g = 0.002 kg
vrms = 2156.78 m/s
As per Newton's II law we know that
rate of change in momentum is Net outside force on the object
now here we will have if net outside force will be zero
then we can say
so from above equation we can say
and hence we have
so the correct answer will be
<em>3.) in the absence of outside forces</em>