Temperature lower than absolute zero is not possible. Lower than absolute zero a gas contain negative pressure and volume which is not possible. temperature is the energy created by moving atoms absolute zero is a complete stand still you can make particles move to the end of the universe but the coldest temperature will be stuck at the point where atoms are motionless
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(a) we can solve the problem by using the mirror equation:
where
f is the focal length of the mirror
is the distance of the object from the mirror
is the distance of the image from the mirror.
For the sign convention, f is taken as negative for a convex mirror and
is taken as negative if the image is located behind the mirror, as in this problem. So we have
and re-arranging the mirror equation we can find the distance of the object from the mirror:
from which we find
(b) The magnitude is defined as the ratio between the size of the image and the size of the object, which is also equal to the negative of the ratio between the distance of the image and the distance of the object from the mirror:
Using what we found at point (a), the magnification in this problem is
where the positive sign means the image is upright.
Answer:
Explanation:
Adiabatic process is the process which occurs without the exchange of heat and mass between system and surrounding. There is exchange of energy only as a work in adiabatic process.
Application of adiabatic Process
- From first law of thermodynamics
For adiabatic Process
so work done is change in internal energy of the system
Answer:
As from the given text, the answers are:
a) Genetic variation is the reason why we all humans look different.
b) Evolution relies on the genetic variations as individuals of species with favorable characteristics are more likely to reproduce.
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