Physics part 1

Temperatures held constant:

• Boyles's law

• Avagadro's Law

• both

• neither

Kinetic energy is a property only of the:

• pressure

• temperature

• volume

• density

During normal laminar airflow, resistance is dependent on which characteristic of oxygen?

• Density

• Viscosity

• Molecular weight

• Temperature

The pressure and volume per minute delivered from the central hospital oxygen supply are

• 2100 psi and 650 L/min

• 1600 psi and 100 L/min

• 75 psi and 100 L/min

• 50 psi and 50 L/min

The reason a patient is not burned by the return of energy from the patient to the ESU (electrosurgical unit, Bovie) is that

• The exit current density is much less than 3 MHz

• Resistance in the patient ’s body attenuates the energy

• The coagulation side of this circuit is positive relative to the ground side

• The exit current density is much less than that at the hand piece

The line isolation monitor

• Prevents microshock

• Prevents macroshock

• Pro vides electric isolation in the OR

• Sounds an alarm when grounding occurs in the OR

The minimum macroshock current required to elicit ventricular fibrillation is

• 1 mA

• 10 mA

• 100 mA

• 500 mA

Appropriate definition: relationships between pressure, volume and area

• pressure = volume/area

• area = pressure/force

• force =

  pressure x area

• pressure = area/force