Why should you never use coarse adjustment when focusing the high-power objective lens of a microscope?

Once you get the item generally focused with the coarse adjustment, leave it alone. If you try to move it again, chance are you'll run into the slide and either knock the specimen or even scratch the microscope's lens. Always use the fine adjustment, and ONLY the fine adjustment knob, once you have set the coarse adjustment to the appropriate level.

Why do Iraqi women where these special kind of bracelets and what is its significance?

So a friend of mine who is in Iraq at the moment told me something about Iraqi women and how most of them wear a certain kind of bracelet. I would like to know what is it for and why do they wear it? What do they mean or stand for?

Can we put political parties aside, the snide comments about Obama, Palin, McCain aside?

I love America. Every day I wake up, I am proud to be an American. And it DOES piss me off that Bin Laden hasn't been captured. He needs his just desserts. Give me a gun and a plane ticket. I'll find the .

Observation from light polluted areas with 8" scope?

has anyone had any experience doing this,does light pollution destroy viewing or can filters help (and how much difference do they make),is astro photography possible in light polluted areas

Is George W. Bush the Antichrist?

No the Anti-Christ will not be revealed until the believers in Christ are called up to be with him. It is not until after that happens that the Anti-Christ will be revealed.

Why am I gaining weight instead of losing weight?

I've been exercising steadily for 2 weeks now. I burn about 400 calories every day. I eat about 1600 calories per day. I only lift twice per week, but do intense conditioning cardio for an hour every other day. I'm a 16 year old male, weighing 145 pounds. I gained 2 pounds so far. I drink a sufficient amount of water every day. This probably isn't muscle. I don't see a difference in the mirror.

What is the concentration of calcium ions?

You have a 50mL water sample that has calcium ions in it, You add excess sodium carbonate (Na2CO3) until all the calcium precipitates out of solution. The precipitate is dried and weighed and it was determined that 3.7g of precipitate (CaCO3) was formed. What was the concentration (M) of calcium ions in the water sample?