Converting SI units

Aiden Metzner 2C
Posts: 67
Joined: Wed Sep 18, 2019 12:21 am

Converting SI units

What is the rule for converting SI units on the test. Will we be penalised if we get the sig figs wrong?

Angus Wu_1A
Posts: 72
Joined: Fri Aug 02, 2019 12:15 am

Re: Converting SI units

Yes, if we get significant figures wrong be will be docked points. As for converting SI units, I would say if the question specifies a unit for the answer, then go for the specific unit. If the question doesn't, then as long as it is an SI unit, (meter, kilogram, second, etc) then I think its fine.

William Francis 2E
Posts: 66
Joined: Wed Sep 18, 2019 12:20 am

Re: Converting SI units

Also, I'd add that it's important to remember what SI units are used for constants, so that you can be sure the units cancel out in your calculations. For instance, lengths used in calculations involving Planck's constant should be in meters, masses should be in kilograms, and times should be in seconds since the unit for Planck's constant is m^2 kg s^-1.

505106414
Posts: 55
Joined: Wed Sep 18, 2019 12:17 am

Re: Converting SI units

Do we need to write out and cross out every unit or is it safe to skip a few of these steps as long as our answer is in the correct unit?