Answer:
Explanation:
Let's begin by explaining that the relation between the Celsius scale and Kelvin scale is:
This means the absolute zero point of the Kelvin scale is
Keeping this in mind, we have the freezing point and boling point of Methane as:
Freezing point:
Boiling point:
According to this, there is a linear relation between the methane scale () and the Kelvin scale in the form:
(1)
Where:
is the temperature in Kelvin
is the temperature in degrees Methane
Firstly, we need to find the value of and with the two given points ( and ):
When and :
(2)
When and :
(3)
Now we have the linear equation:
(4)
Isolating :
(5)
Evaluating for :
(6)
Finally:
This means
I think the answer is c) 1
Hope it helps and have a good day
Answer:
185 A
Explanation:
In order for the rod to float above the ground, the magnetic force between the two rods must be equal to the weight of the floating rod.
So we can write:
where the term on the left is the magnetic force and the term on the right is the weight, and where:
is the vacuum permeability
is the current in the two rods (they carry the same current)
is the length of the floating rod
r is the distance between the rods
is the mass of the floating rod
g is the acceleration due to gravity
Here we have:
Therefore, solving for I, we find:
Answer:
42
Explanation:
27.9+13+1.21=42.11
to a significant figure= 42