Recent content by phy9

Thanks.. Apparently 42. >>> 33*(mp*Nav) + 42*mn*Nav 75.60404990520709 while mn is mass of a neutron. Though it is a bit higher than the value in ptable.com..

Hi, I'm trying to calculate the molar mass of As, tough it differs from the value that is written in http://www.ptable.com. The molar mass of Arsenic (As) according to 'ptable.com' is 74.92 g/mol. I tried to calculate the molar mass with python: >>> Nav = 6.022140857E23 >>> mp = 1.6726219E-27...

Hi Buzz, I had thought of something like that but I'm looking for something that will round the numbers automatically in a given column, where one column is the value and the adjacent column is the error. This method is better, because that this way I don't need to refer to every cell of error...

I'm having a physics lab in which a report needs to be submitted after an experiment. The experiment includes many measurements: values with their errors. I need to round the error up to 2 significant digits, and then to round the value up to to the amount of digits that the error is presented...