Why so many sources give different values for reciprocal conversions Curie and Becquerel?
1 Ci = 3.7 x 10^10 Bq or 37,000,000,000
1 Bq = 2.7 x 10^-11 Ci or 0.000000000027
nevermind, please delete this, let it be buried.
The two factors are consistent. One is the inverse of the other.
Apparently you realized this before your second post.
The reason why different sources give slightly different values for the reciprocal conversions between Curie (Ci) and Becquerel (Bq) is because these are approximate values that involve rounding and conversions between different systems of measurement.
The conversion factor between Ci and Bq is defined as 1 Ci = 3.7 x 10^10 Bq, which means that one Curie is equal to 3.7 billion Becquerels. However, if you calculate the value precisely, it would be 37,000,000,000, which is the same as 3.7 x 10^10.
Similarly, the conversion factor between Bq and Ci is defined as 1 Bq = 2.7 x 10^-11 Ci, which means that one Becquerel is equal to 0.000000000027 Curies. Again, if you calculate the value precisely, it would be 0.000000000027, which is the same as 2.7 x 10^-11.
The variations you may find in different sources could be due to rounding errors or different methods used for conversions. These values are often rounded to a certain number of decimal places for ease of use and to avoid overly complicated numbers.
To get the most accurate conversion, it is always better to use the exact conversion factors provided by scientific authorities or organizations, such as the International System of Units (SI), which defines the relationships between different units of measurement.