Use the partition function for a harmonic oscillator, q = 1 / (1- e^-hv/kbt) , to determine the ratio of populations in the lowest and first excited energy levels, p0/p1 , for the indicated systems at two temperatures, 50 k and 298 k :
(a) the 1700 cm−1 stretching vibrational mode for the carbonyl (c=o) group in the peptide bond of a polypeptide.
(b) the 150 cm−1 torsional vibrational mode for the c=c bond in trans-2-butadiene.

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves