In which stage of growth and development is a child's head usually one-fourth the entire body length?

When the body is exposed to more heat energy than it loses, __________ result(s).

a. hyperthermia b. heat cramps c. heat exhaustion d. heatstroke

The principle that gas flow is proportional to the pressure drop across a known resistance is used by which of the following devices?

a. Turbine flowmeter c. Fleisch pneumo-tachograph b. Thermal flowmeter d. Ultrasonic pneu-motachograph