0
Still curious? Ask our experts.
Chat with our AI personalities
Professor
Rafa
TaigaAdd your answer:
Earn +20 pts
If two samples have identical Rf values does this mean that they are necessarily identical molecules Explain?
No. The molecules MAY (and probably are if you are presented with this situation in school/college lab courses) be identical but just the Rf values is not enough information to determine, you must conduct additional tests. Two different molecules can have the same Rf value.Compound A will always have an Rf of X in solvent M. Compound B will always have and Rf of Y in solvent M. But, Rf X can be equivalent to Rf Y without compounds A and B being identical.
What kind of coin is RF on front and 10F on back?
This is a 10 Franc ("10F") coin from France ("RF" stands for "Republique Francaise", which is French for the French Republic)
624÷ =62.4?
4.67
How do you calculate for bandwidth power saving in ssbsc?
SSBSC uses 1/2 of the bandwidth and 1/6 as much RF power as AM modulated 100% .
How is math used in MRI?
Inside the 'donut' of the MRI machine are a huge number of RF (radio frequency) sources and RF detectors. After the sources shoot a short, powerful pulse of RF into you, the sources shut off, and the tissues throughout your body "ring", in response to the RF they've absorbed, combined with the powerful field of the giant permanent magnet that's also all around you inside the donut. The detectors listen to the 'ringing' of your body's tissues from a huge number of different directions, all around the ring. Each detector hears a ring of a slightly different level, and hears it fade out after a slightly different time. The signals that are heard by all of the detectors are compared and combined to give a picture of what's inside you. The basic concept of forming the image is the same as in other forms of "tomography" ... the CT scan, using X-rays instead of RF, and the PET scan, using positron emission from a radioactive substance. The math is incredibly complex in each case. On a completely irrelevant note, but one which I can't bring my self to conclude without mentioning ... probably my only claim to fame is the fact that my brother-in-law is one of the names on the original patent granted to GE for the computed tomography process, and his sister was involved in some good-science early MRI research when we met in the late 70s. Those facts and several nickels have bought me many cups of coffee through the years ever since.
