What dangers does compressed air pose if used incorrectly?
What will be an ideal response?
Never blow compressed air at yourself or anyone else. Under high pressures, air can enter the bloodstream through the skin and cause serious injury or death. Eye injury can easily result from high-pressure air blown in the face.
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Air enters an uninsulated nozzle at 5 m/s, 500 kPa, and 50°C. The cross-sectional area of the inlet is 0.0002 m2. The air exits at a velocity of 120 m/s and a temperature of 48°C. Determine the heat transfer rate for the nozzle.
Given: Air, P1 = 500 kPa; T1 = 50°C = 323 K; V1 = 5 m/s; A1 = 0.0002 m2; V2 = 120 m/s; T2 = 48°C = 321 K What will be an ideal response?
In the northern hemisphere, solar collectors are most efficient when facing ____.
A. solar north B. solar south C. magnetic north D. magnetic south
Which breed of cattle has had more registered cattle than any other breed?
a. Angus c. Texas Longhorn b. Hereford d. Charbray
The relatively easy movement of small groups or individuals in a liquid is called ____________________.
Fill in the blank(s) with the appropriate word(s).