A 65-year-old male is noted by his family to have developed…

A 65-year-old male is noted by his family to have developed a short shuffling gait and difficulty getting up from a seated position.  On physical examination, you note a resting tremor and rigidity of the joints with passive range of motion.  Based on these findings, which of the following conditions is the most likely diagnosis for this patient?

The mean free path of an oxygen molecule is [l] m, when the…

The mean free path of an oxygen molecule is [l] m, when the gas is at a pressure of [p] Pa and a temperature of [t] K. The molar mass of oxygen is 32.0 g/mol. Assuming that the molecules are moving at their root-mean-square speeds, what is the average time interval between collisions of an oxygen molecule in nanoseconds? 1 ns = 10-9 s Boltzmann constant = 1.38 × 10-23 J/K Avogadro’s number = 6.02 × 1023 molecules/mole R = 8.314 J/mol · K = 0.0821 L · atm/mol · K.  Enter only a numerical value (3 sig. fig) without units.