How Do You Convert and Round Measurements to SI Units with Significant Figures?

[jybe]

Homework Statement

If I am asked to give my answer in acceptable SI units and to 3 significant figures, how would I express my answer?

Homework Equations

Answer: 589883.4263 J

The Attempt at a Solution

My instinct would be to put this in KJ, but I don't know if that's an "acceptable SI unit". I can't find anything about it online. Does it have to stay in J?

If KJ I would write it as 590 KJ, right?

and if I had something like 1674.324432 J, would I express it as 1670 J or 1.67 KJ? I'm really confused.

Thanks

 

[Doc Al]

Both J and kJ are perfectly acceptable SI units. The base unit is the Joule, of course, in case that's what they are looking for.

 

[Orodruin]

Note that its kJ, not KJ. Case is important in many prefixes.

 

[jybe]

Note that its kJ, not KJ. Case is important in many prefixes.

Oh wow...I actually think that was the problem. I used J this time and got it right but thanks for that heads up