<span>a decrease in the distance between the earth and the moon</span>
The variation of entropy of a substance is given by
(1)
where
is the heat exchanged in the process
T is the absolute temperature at which the transformation occurs.
The process in the problem is the solidification of the liquid Gallium, which releases an amount of heat equal to:
where m is the mass of the substance and
is the latent heat of fusion of Gallium. Using m=64.0 g, we find
where the negative sign means the Gallium is releasing heat to the environment.
Now we can use equation (1) to find the variation of entropy, but first we need to convert the temperature into Kelvin:
And so the variation of entropy is
and the negative sign means the entropy in the process is decreasing.
Answer:
absorb more heat and get heated quickly
Explanation:
From the information given in the drawing, it's not possible
to tell whether the displacements are equal, because we
don't know what the vectors represent.
If the vectors are distances, then the displacements are not
equal, because the distance between the start and end points
are not equal.
If the vectors are speeds, then they don't tell us anything about
the distance between the start and end points, so we can't calculate
the displacements.
Answer:
Answer:
the shoe which having heel of smaller crossection area.
Explanation:
Pressure is defined as the thrust acting per unit area.
Thrust is the force which acts on the surface perpendicularly.
Pressure = force / Area
Its SI unit is Pascal or Newton per square metre.
As both the shoes have same mass, so force is same but the area of crossection is different for both the shoes.
Teh shoe having heel of small crossection area exerts more pressure on another person's feet then the shoe having heel which has more crossection area.
Explanation: