(a) One of the first "pure" Bose Einstein condensates was
created with a low density (1020 molecules per cubic
meter) gas of lithium with an atomic mass of 7.02 u. What is the
critical temperature for the transition to a Bose Einstein
condensate for lithium? Assume the spin for the atom is 1. The
temperatures actually achieved in these experiments were below 100
nK. What fraction of the lithium molecules are in the Bose Einstein
Condensate phase at 100 nK?...
1.Define terms and explain the difference between Boltzmann
Statistic, Fermi-Dirac Statistic and Bose-Einstein statistic.
2. Give an example for each of system in order to understand and
handle aformentioned statistics.
3.Show that in a given circumstances Quantum statistics ignore
or pass over classical statistic.
At very low temperatures, the specific heats of gases can change;
they get smaller, almost as if some degrees of freedom get “frozen
out.” Explain, using the simple harmonic oscillator as a guide, how
this might happen.
Describe why high pressures but low temperatures cause
substances to deviate from ideal gas conditions. Make sure to
discuss the assumptions we made to come to the ideal gas law and
how high pressures and low temperatures negate those
assumptions.
Large land mammals of the Arctic endure very low ambient
temperatures and stand on frozen ground for long time periods. This
can result in large differences in temperature across the body. The
tissue temperature in the extremities (feet and lower legs) can be
up to 25oC cooler than in the thorax.
(4pts) Draw the Hb-O2 equilibrium curve and indicate on the
graph what the usual effect of increases and decreases in
temperature on Hb-O2 binding. Make sure to label your...
Microorganisms called psychrophiles will grow only at low
temperatures (at or near 0°C). This restriction on a microbes
growth would most directly impact
a. inoculation
b incubation
c isolation
d inspection
e inspection
f information gathering
g identification
Briefly explain the two postulates of relativity, how
they differed from classical physics, and
why Einstein was led to propose them. List at least 2
implications of the postulates.