6. Which statement is true about alr pressure acting on an object? The amount of air pressure pushing down on an object will gradually decrease with time.
The amount of air pressure pushing up on an object will gradually increase with time.
There is just as much air pressure pushing up as there is pushing down on an object.
There is more air pressure pushing up on an object than there is pushing down.​

Which are reasons cells undergo cell division?

What is the role of pancreatic juice in digestion?

Waste water from industries and domestic sources can be treated by chlorination or ultraviolet radiation. there are pros and cons to using either chlorine or uv radiation to kill harmful microorganisms. what is one reason chlorination would be preferred over ultraviolet radiation? a) chlorine only eliminates visible impurities and is ineffective against microorganisms. b) chlorine not only kills bacteria but provides a residual effect on returning microorganisms. c) uv radiation can be used only to treat drinking water and is ineffective in treating waste water. d) ultraviolet radiation is more effective