Physics

Problem

Three small point charges have magnitudes

q_1 = 6.432\times10^{-6}\,\text{C}

q_2 = 1.8\times10^{-5}\,\text{C}

and

q_3 = 0.723\times10^{-5}\,\text{C}

. (a) Find the algebraic sum

Q = q_1 + q_2 - q_3

in coulomb without any rounding. (b) Rewrite the result of part (a) in scientific notation and round it to the proper number of significant figures. (c) Express the rounded value of

Q

using an appropriate SI prefix instead of the power of ten.

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