Qualification > Sciences
Physics CIE help
Saladin:
I think the answer is D. Because + the inaccuracy and - the inaccuracy is stll within the 300-350 range. So it is 300.
nid404:
--- Quote from: tmisterr on May 01, 2010, 05:23:05 pm ---A student makes measurements from which she calculates the speed of sound as 327.66ms–1.
She estimates that her result is accurate to ±3 %.
Which of the following gives her result expressed to the appropriate number of significant figures?
A 327.7ms–1 B 328ms–1 C 330ms–1 D 300ms–1
--- End quote ---
ok...3% of 227.66 is 9.8 approx 10...so the final answer is rounded off to the nearest 10 which is 330
tmisterr:
thanks nid
how bout this one? I know the value but how do get the direction?
q36 ATTACHED PAPER
nid404:
field always from positive to negative...so from Q towards P
tmisterr:
how do you know when earthed plate is positive and when it is negative? it confuses me!
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