Classify the following statements about barometers

(1) The height of a mercury barometer column changes when atmospheric pressure changes,True

(2) Aneroid barometers contain no mercury but are calibrated in inches of mercury,True

(3) At sea level, a mercury barometer will read about 76 cm regardless of tube length,True

(4) Weather reports on TV always give the technically precise definition of pressure,False

(5) A mercury barometer works because of surface tension alone,False

(6) The vacuum at the top of a mercury barometer sucks the mercury upward,False

(7) Barometers can only measure pressure if they contain liquid mercury,False

(8) A reading of 28 inches of mercury indicates higher pressure than 30 inches,False

Explanation

The column height changes with pressure (true). Aneroid barometers are calibrated in mercury units for convenience (true). The tube can be any length longer than 76 cm; the column height stays about 76 cm at sea level (true). TV weather reports use shorthand (false). Barometers work by atmospheric pressure, not surface tension (false). The vacuum doesn't suck; atmospheric pressure pushes (false). Aneroid barometers work without liquid (false). Lower inches = lower pressure (false).