## Constants in the Quantum World

Baoying Li 1B
Posts: 113
Joined: Sat Aug 17, 2019 12:18 am

### Constants in the Quantum World

Hey, can anyone list all the constants of the formulas of quantum for future reference? Like the speed of light is c=3.00*10^8 m/s, what else? Do we need to remember all of them? I believe it will save most of us lots of time. Thank you.

xenamclean_1G
Posts: 51
Joined: Sat Jul 20, 2019 12:15 am

### Re: Constants in the Quantum World

h= 6.626 x 10^-34 Js and R= 3.29 x 10^15 Hz are the only other ones I can think of.

205296774
Posts: 66
Joined: Thu Jul 25, 2019 12:15 am

### Re: Constants in the Quantum World

Sure! I think we only need to know these (on a test, they will be provided) -
Plank's Constant: h=6.62608 x 10^-34 J.s
Rydberg Constant: R=3.28984 x 10^15 Hz
Speed of Light: c=2.99792 x 10^8 m.s-1
Mass of electron: me=9.109383 x 10^-31 kg

AndreiRekesh1I
Posts: 52
Joined: Fri Aug 30, 2019 12:15 am

### Re: Constants in the Quantum World

In my experience, remembering not only the values of constants but also the molar masses of common elements saves a lot of time.

ATingin_3I
Posts: 51
Joined: Fri Aug 30, 2019 12:17 am

### Re: Constants in the Quantum World

When we are doing problems like these, is the mass of an electron always in terms of kg? Or do we have to convert them to g?

Emily_4B
Posts: 57
Joined: Wed Sep 18, 2019 12:21 am

### Re: Constants in the Quantum World

so the constants will be given, but will the formulas that use the constants be given or do we have to memorize the different formulas?

Haley Dveirin 1E
Posts: 101
Joined: Sat Jul 20, 2019 12:17 am

### Re: Constants in the Quantum World

On the test we took the formulas were given but I would memorize them just in case and also understanding the formulas helps you understand the concepts. As for the constants- I think those will always be given.