Answer : The ratio of effusion rates for helium and argon is 3.2 : 1
Solution : Given,
Molar mass of Helium = 4 g/mole
Molar mass of Argon = 40 g/mole
Rate of effusion : It is defined as the rate of effusion of a gas is inversely proportional to the square root of the molar mass of the gas.
Formula used :

where, M is the molar mass.

Now put all the given values in this expression, we get

Therefore, the ratio of effusion rates for helium and argon is 3.2 : 1
the force of attraction of iron fillings towards magnet
The other name of Entropy is "Randomness" which can be defined as "<span>a measure of the overall disorder of a system"
In short, Your Answer would be Option B
Hope this helps!</span>
Answer:
362,5J
Explanation:
formula for calculating Gravitational Potential Energy is mass×gravitational field strength ×height
12.5×10×2.9=362,5J
<span>(1.35 x 2 x 10^-10 m/atom) = 2.0 x 10^7 atoms</span>