A certain automobile tire has a volume of 0.0185 m3. If the absolute (or total) pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire? (R = 8.31 J/mol K, NA = 6.022 1023 molecules/mol)
A) 2.25 1023 molecules
B) 2.25 1024 molecules
C) 3.25 1023 molecules
D) 3.25 1024 molecules
E) 3.25 1025 molecules
Question 2
If the frequency of a light beam is doubled, what happens to the momentum of the photons in that beam of light?
A) It stays the same.
B) It is halved.
C) It is doubled.
D) It is reduced to one-fourth of its original value.
E) It is increased to four times its original value.
stage II pressure ulcer
Blood Pressure Guidelines
Apply direct pressure to the patient’s wound.
Measuring Air Pressure
The European Alps have lost ~30% to 40% of surface area and ~50% of volume since the 1850s.
Blood Pressure (BP)