Select the two variables that are held constant when testing boyle's law in a manometer. pressure temperature volume of gas mass of gas atmospheric pressure

a) Temperature  

b) Mass of gas

Explanation:

The Boyles’ law states that the pressure of a gas is inversely proportional to its volume (with a fixed mass). This has been proved when temperature was kept constant.

Thus, overall there were two quantities that were not changed during Boyle’s experiment  

a)Temperature  

b)Mass of gas

Hence, the formula for Boyle’s law is as follows  

Where  P is pressure

V is volume and k is constant

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a