Question

the masses of two bodies are measured to be 15.7 plus minus 0.2 kilogram and 27.3 plus minus 0.3 kilogram what is the total mass of the 2 and the error in it

Answer 1

Answer:

(43.0 plus minus 0.5)

Explanation:

See the image for solutions Also

Answer 2

Answer:

Let the mass be m1 and m2

and see attachment

or

M1 = 15.7 ± 0.2------------1

M2 = 27.3 ± 0.3------------2

By adding 1 and 2

m1 + m2 = 15.7 + 27.3

= 43.0 or 43

hence E or Error = ∆m1 + ∆ m2

= 0.2+0.3 = 0.5

Mass = 43.0 ± 0.5