Before you can remove the regulator from your scuba cylinder, you must: A. Turn the air all the way off.
B. Depressurize the system by depressing and holding one of the purge buttons.
C. Make sure the low-pressure inflator hose remains connected to the BC power inflator.
D. Both the first and second answers are correct

Natural forces that can alter ecosystems include seasons and climate changes. t or f

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water