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There can be no equivalenece.
A becquerel is the SI derived unit of radioactivity. It is defined as the activity of a quantity of radioactive material in which one nucleus decays per second. It is a measure in inverse second, s-1 and so has dimensions [T-1].
A milligram is a measure of mass, whose dimension is [M].
The two have different dimensions and according to basic principles of dimensional analysis, conversion from one to the other is not valid.
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0.25 equals how many mg?
0,25 of what ? gram, kilo, ... ? I'll have to guess 0,25 gram are 250 milligram
.0125 milligrams equals how many micrograms?
There are 1000 micrograms in a milligram. You multiply by 1000 here. 0.0125 milligrams is 12.5 micrograms.
Does 45mg equals 15 gms?
No. 45 mg equals 0.045 gms, since each milligram equals 10-3 gms.
Which is heavier - a gram or a milligram?
One gram equals 1000 milligrams.
A grain of salt equals 1 milligram?
A grain of salt does not equal 1 milligram; rather, it is approximately 58 milligrams. This discrepancy arises from the historical use of the grain as a unit of measurement in the apothecaries' system, where 1 grain is defined as 1/7000th of a pound. In contrast, the metric system defines 1 milligram as 1/1000th of a gram. Therefore, a grain of salt is significantly larger than 1 milligram.
