Speed of light

[Jessica Dharmawan 1G]

When doing calculations, should we use 2.99792 × 10⁸ m.s^-1 or 3.00 × 10⁸ m.s^-1 for the speed of light?
I used the 3.00 × 10⁸ m.s^-1 on the midterm and got an answer that was two hundredths off and got it marked wrong, so what should be the accurate number to use?

[WilliamNguyen_4L]

I've been using the speed of light as 3.0 x 10^8 and I've had no problems with getting the correct answers on the tests and midterms.

[sophiebillings1E]

It depends on the sig fig in the problem stay true to that.

[Michael Torres 4I]

I have had no issue using 3.0*10^8 m/s on my exams. I recommend asking your TA about the problem you missed to see what they recommend.

[anthony_trieu2L]

Just to be safe, you should use the constant given on the formula sheet. Otherwise, ask your TA for their preference.

[clamond3F]

For homework, I have just been using 3.0x10^8 m/s and it is fine, but for the tests my TA said that the answers on their score sheet are calculated using the exact constants that are on the equation sheet.

[yuetao4k]

Use the given constants until the end of the problem and then round to your significant figures!

[604656370]

I've been using 3.0X10^8 m/s but just to be safe, use the constants he provides on the formula sheet.

[Sheridan Slaterbeck 1J]

My TA said to use the number given on the equation sheet otherwise rounding may affect your final answer and they can take points off for that.

[Jack Hewitt 2H]

When doing calculations, should we use 2.99792 × 10⁸ m.s^-1 or 3.00 × 10⁸ m.s^-1 for the speed of light?
I used the 3.00 × 10⁸ m.s^-1 on the midterm and got an answer that was two hundredths off and got it marked wrong, so what should be the accurate number to use?

Look at the sig figs in the problem and use that as a guideline.

[Nina Do 4L]

In the past I have used 3.0 x 10 ^ 8m/s and never saw any problems. However, a coversheet with some equations will be given to us so I'd use that if you're unsure.

[Lopez_Melissa-Dis4E]

Personally, I would just use the constant given on the formula sheet to be safe. However you should be aware of significant figures to ensure the correct answer.

[Lydia Luong 4L]

I haven't had any issues with using 3.0 x 10^8, I think you should be able to use this!

[Mark 1D]

3X10^8 should be fine I think