Why should air bubbles be removed from the buret tip?
If the volume of air in the tip remained constant and the bubble remained stationary in the tip, the bubble would be of no consequence. As long as you're subtracting the initial volume reading from the final volume reading, the amount delivered would still be correct if the above was true. Unfortunately, though, bubbles will tend to completely pop out when a large volume of liquid is being dispensed from the buret. Because the bubble occupies a significant volume in and of itself, if it came out of the tip during the course of dispensing, the actual volume delivered would be less than the volume reported. Due to the very likely possibility of this happening if a bubble is allowed to remain, it's best to go ahead and get rid of the bubbles before using the buret to dispense a measured volume of liquid.
I am a 23 years old guy and I have phimosis. For my health and sex should I cut my foreskin?
Hi:) Have you tried other options? I know you can get this cream which will help you stretch the foreskin, probably other products out there too, so I think you should ask your doctor since you might need a prescription. But if all other options fail(at least I think circumcision should be the last thing to try) medical circumcision might be the way to go for you. Just keep in mind that some circumcised men report decreased sensitivity in the penis due to the scar, and the fact that the foreskin isn't protecting the penishead, and thus rubs against underwear and such. Ask you doctor to inform you about this. Hope things turn out good for you:)
Best way to whiten teeth???
My teeth have become really stained over the years (drinking tea & smoking) & no matter what I do, I can't get them white again!! I've had them cleaned by the dentist, used special toothpastes, etc. What can I do? It's mostly the front, top 2 teeth!! I may start drinking from straws so like pop & tea can't touch my teeth?! Would that help?? lol Seriously need help though!!