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Is there a maximum number of xrays that is recomended , over a period of time - and if so what is the number and over what period of time What are the dangers to your body of exceeding this limit
what would happen if you submurged a rubber container full of hydrolic oil ,with a tube reaching the surface to the bottomof the ocean? Would it force the fluid through the tube to the surface at a...
hi! I have the following problem. I need to pass an advanced numeracy test and I was wondering if there is any intelligent way of solving this problem. You have only 20 seconds, you cannot use a...
i am considering buying a tv and am asking you experienced abers which is best based on your knowledge,ie plasma or lcd. i have done a google but its a mine field thus my q. help really appreciated...
How does an atom hold on to its electrical charge,does it weaken over time ? If it loses it, is that what is meant by decay. What does an atom become if it has no electrical charge?
I read recently that there is a perfect kilo weight which is losing weight and so no longer is a perfect kilo weight. This made me think is anything else in the world able to be described as perfect....
If we somehow survive extinction we are on the road to immortality.with the rapid advances in computers, nano technology,robotics,medicine etc.I believe we will become more machine than flesh and...
The other day I heard a mnemonic for remembering the correct sequence for the classification of living things (Phylum, Family etc), but I can't remember it! Anybody know a good one for this. Thanks,...
At school we learned ' I wished to go TOA dance SOH I took a CAH' as a mnemonic for the sine, cosine, and tan ratios.Did anyone use any other mnemonic for these ratios? What mnemonics would you have...
we see people at beach using silver foil to lie on to attract sun rays.....does a mirror or silver foil attract the sun more....do uv rays bounce back of the foil material and come back to tan/burn...