Question

explain the statement in picture where G is equal To (see above) <br /><br />plz help.... <br />challenge for physics <br /><br />class 9th <br /><br /><br />be brainy and explain properly !!!<br /><br />thnku <br />

Answer 1

The mass of an electron is 9.109 382 91(40) x 10-31 kg, where the number in parentheses indicates uncertainty in the final two digits.

ii Calculating the gravitational attraction between two objects requires taking the product of two masses and dividing by the square of the distance between them, then multiplying that value by G. The equation is F=Gm1m2/r2.

iii CODATA's latest set, released in 2010, recommended a value for G of 6.673 84(80) x 10-11 m3 kg-1 s-2compared to its previous result from 2006 of 6.674 28(67) x 10-11 m3 kg-1 s-2. The values in parentheses indicate standard uncertainty (based on standard deviation), in this case plus or minus 0.000 80 x 10-11 m3 kg-1 s-2and plus or minus 0.000 67 x 10-11 m3kg-1 s-2 respectively.

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