Knee orthosis, elastic with joints, prefabricated item that has been customized to fit a specific patient by an individual with expertise

The gases that have the same molecular weight and cannot be separated on the basis of weight alone during mass spectroscopy include which of the following?

a. N2 and O2 c. CO2 and N2 b. N2O and O2 d. N2O and CO2

After restraining a violent patient on the stretcher, which action is it essential that the EMT perform as soon as reasonably possible?

A) Check the tightness of the chest strap B) Check the extremities for pulses and motor ability C) Inform the patient of what will occur during transport D) Obtain a set of vital signs, excluding temperature