Answer: 
Explanation:
The mean free path
of an atom is given by the following formula:
(1)
Where:

is the Universal gas constant
is the absolute standard temperature
is the diameter of the helium atom
is the Avogadro's number
absolute standard pressure
Knowing this, let's find
from (1), in order to find the radius
of the helium atom:
(2)
(3)
(4)
If the radius is half the diameter:
(5)
Then:
(6)
(7)
However, we were asked to find this radius in nanometers. Knowing
:
(8)
Finally:
This is the radius of the helium atom in nanometers.
Ask ya mother .. she birthed you so she’ll know .
Answer:
0
Explanation:
When y=0, the line is on the x axis, which means that it is at a speed on 0.
There are several types of work. Let’s talk about mechanical work:
W = F*d
So you need to know the force and the distance.
There are several ways to calculate the power. First:
P=W/t
So you can calculate it like that if you have already calculated the work. Remember W is F*d, so:
P=F*d/t
Remember d/t is also velocity:
P=F*v
So you can also calculate the power if you know the force and the velocity, with no need to know the work or the distance.
So in both cases we have a formula that requires to know the force<span>.
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