1. why was it necessary for boyle to seal one end of his j-tube?

2. what would have happened if boyle had allowed the temperature of the trapped air sample to change as he added mercury to the tube?

1. It was necessary for Boyle to seal one end of the J-tube as it allowed him to examine the pressure-volume relationship without complications from other elements, like changes in the amount of gas or temperatures. He changed the volume and the pressure of the gas and came to know that the volume of a fixed mass of a gas is inversely proportional to the pressure at constant temperature.  

2. If Boyle would have permitted the temperature of the trapped air sample to change as he supplemented mercury to the tube, the temperature would not have remained same and thus, he would not be able to make the supposition of constant temperature in his calculations.  

no, i was listening to water by schoolboy q while and i saw this question

explenation:

water isn't wet. wetness is a description of our experience of water; what happens to us when we come into contact with water in such a way that it impinges on our state of being. we, or our possessions, 'get wet'. a less impinging sense experience of water is that it is cold or warm, while visual experience tells us that it is green or blue or muddy or fast-flowing. we learn by experience that a sensation of wetness is associated with water: 'there must be a leak/i must have sat in something.'

cock topography

the study of the surface of a large voluptuous cock.

look at that sorostitute right she's a cock topographer!

what classes are you taking this

cock topography!