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Why should the microscope be calibrated for each objectiveand prior to each use?
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No, you should have made prior arrangements.
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Dust and debris should be removed by vacuum cleaning rather than by sweeping or compressed air blowing that tends to redistribute contaminants rather than remove them.
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Infectious disease was the leading cause of death prior to the 20th century !:]
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Prior knowledge allows you to make a well-informed hypotheses and a better-planned experiment.
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An experimental question is based on prior knowledge. This type of question can also be tested and will have an answer.
What was Leeuwenhoek's first job prior to working on the microscope?
Antony Leeuwenhoek's job prior to working on the microscope was being a shopkeeper.
What is a cell that you do not need a microscope to see?
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What diagnosis should be made prior to a parathyroidectomy?
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The correct phrase is "prior to." This indicates that something happens before another event or action. "Prior before" and "prior towards" are not grammatically correct phrases and should be avoided.
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Should divorce prior to bankruptcy?
divorce should not prior to bankruptcy. you agreed to love this person unconditionally through worse times. you should stick together and work this probem out.
What are two ways to use an equal arm balance?
An equal arm balance can be used to weigh or compare objects with a high degree of accuracy. The arms must be properly calibrated to equal lengths and balanced evenly on the axis of rotation prior to use.
When should you drink vale prior to a urinalysis?
Never
Should you withhold food from a horse prior to surgery?
This can depend on the surgery the horse is going to have, you should always ask your equine vet about feeding prior to surgery just to be sure.
Who discovered the simple microscope?
Short answer: Zacharias Jansen Long answer: Your question is not valid for 2 reasons: 1. You cannot "discover" something if it does not exist. You should be asking who invented it, not who found it laying around somewhere. 2. A "simple microscope" is not common terminology. Simple compared to an electron microscope? or simple compared to a compound microscope? What is typically referred to as just "microscope" is technically a compound microscope. A set of multiple lenses mounted in a desktop style that allows the compounding of magnification. A compound microscope is the standard microscope in any basic lab setting. Anything more "simple" than a compound microscope would not even really be a microscope, it would either be a telescope, or simpler than that is a magnifying glass (with a single lens) The inventor of the magnifying glass was: Roger Bacon The next step up is the telescope invented by: Zacharias Jansen The next step up is the "compound microscope" which was also invented by: Zacharias Jansen (this is the simplest form of what would be recognized as or named "microscope") If you wanted to go even "simpler" and define microscope as anything that magnifies, there were reading glasses around for thousands of years prior, and even "reading stones" which were lumps of polished glass used to magnify parchment in Egypt as far back as 7000 B.C. (inventor unknown). So it really depends on how you wish to refine your meaning of simple. The magnification of anything? There is no known inventor for reading stones, his name is lost to time. Or if you mean the first invented microscope that could examine things too small for a human eye to detect, that's a compound microscope. Thus if I am guessing your meaning correctly, you meant to ask this question: Question: Who invented the compound microscope? Answer: Zacharias Jansen
