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DeBroglie Units

Posted: Sun Dec 09, 2018 11:20 pm
by NatBrown1I
Why does the De Broglie equation use kg instead of grams?

Re: DeBroglie Units

Posted: Sun Dec 09, 2018 11:37 pm
by 405021651
kg is in SI units , grams is not

Re: DeBroglie Units

Posted: Sun Oct 06, 2019 4:28 pm
by 904914037
Yes, the DeBroglie equations uses SI units for all of the units involved in the equation. It is important to also remember that velocity is meters per seconds. So if you are given anything other than these units, for example kilometers per hour, you would have to convert this to meters per second.

Re: DeBroglie Units

Posted: Thu Oct 10, 2019 1:55 pm
by Joanne Lee 1I
You also need to remember that you are dividing Planck's constant by the momentum and the units for Plank's constant is J(s) where Joules is kg⋅m2⋅s−2. So, in order for the two masses units to cancel out, you have to use kg in the denominator as well. It's always about using the same units as the constants given so the units can cancel out.