You should stop<span> before </span>crossing railroad<span> tracks: Whenever a </span>crossing<span> is not ... Follow </span>no closer than<span> 10 feet behind the large truck. </span>
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.
Explanation:
It is given that,
Length of side of a square, l = 24 cm = 0.24 m
The uniform magnetic field makes an angle of 60° with the plane of the coil.
The magnetic field increases by 6.0 mT every 10 ms. We need to find the magnitude of the emf induced in the coil. The induced emf is given by :

is the rate of change if magnetic flux.

is the angle between the magnetic field and the normal to area vector.





or
EMF = 60 mT
So, the magnitude of emf induced in the coil is 60 mT. Hence, this is the required solution.
Abiotic is anything that is not alive (i.e. Rock)
Biotic is anything that is alive (I.e. Sunflower)
Answer:
b)
Explanation:
Given that
The power source still connects it means that the voltage difference will be same in above both condition
As we know that

Or we can say that
----1
Where d is the distance between two plates ,A is the area.
When K=4.2 and distance become double

----2
Now from equation 1 and 2

So
