Exercise 8.7

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Kellina Tran 2I
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am

Exercise 8.7

Postby Kellina Tran 2I » Thu Jan 18, 2018 2:27 pm

Why is it that the answer is written as +4.90 x 10^2 J instead of kept as 490 J?

Hyein Cha 2I
Posts: 103
Joined: Fri Sep 29, 2017 7:05 am
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Re: Exercise 8.7

Postby Hyein Cha 2I » Thu Jan 18, 2018 2:42 pm

it's just to keep track of sig figs. You do not need to write it in scientific notation :)

Katelyn 2E
Posts: 35
Joined: Sat Jul 22, 2017 3:01 am

Re: Exercise 8.7

Postby Katelyn 2E » Sun Jan 21, 2018 2:42 am

My TA said that sig figs aren't as big a deal this quarter because students end up focusing more on worrying about sig figs than they do about getting the actual concepts down/the problems right. But yes, answer is written in scientific notation just for the purpose of sig figs.

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