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Constants given on the test?
Started by swifteagle43
Come on, do you really think you're supposed to know the value of planck's constant? Not only that, but I would be surprised if it were not fully described in a passage. All that I can think of that you must know is avogrado's number..it wouldn't hurt to know the speed of light and the speed of sound (like 340 m/s in the air)
also memorzie the color of frequencies. like which frequency corresponds to the color...
Plancks constant is a pretty common constant, so they might expect you to know that its 10-34 order but they might not ask for exact values. You should know the universal gas constant (both in J values and atm values). You do not need to know the Rydberg Constant (Rh). You should also know the speed of light.
Thus:
Know For Sure:
R, c
Don't Learn:
h, k (from Coloumb's law), G (Newton's law of Gravitation), Rh (Rydberg)
Thus:
Know For Sure:
R, c
Don't Learn:
h, k (from Coloumb's law), G (Newton's law of Gravitation), Rh (Rydberg)
I had this question as well... Any other constants to remember?
i really really really don't think you need to memorize too many constants
i mean they usually even give you the speed of light.
think about it this way. through your practice, you'll already know all the main constants that you need to know. constants are not something you guys/gals should worry about
i mean they usually even give you the speed of light.
think about it this way. through your practice, you'll already know all the main constants that you need to know. constants are not something you guys/gals should worry about
Awesome, I was stressing about this. Also, I know is may sound crazy, but should we memorize values of tangent or inverse tangents, etc? Should we memorize square root values, like square root of 7, or is just good to know square root of 2 and 3? I know this sounds crazy, but I'm just worried, not too good at math, and I don't want to screw up any calculations...
Know root 2 and root 3 (1.4 and 1.7, respectively). Those come up very very often. Like doubling the height in freefall raises the impact velocity by root 2-- you might need to quantify that. If it was 10m/s before, now it's (10*root2) = 14m/s.
If you're not good at math, convert everything to scientific notation. It's really easy to add and multiply stuff when you use scientific notation, and its pretty tough to make a stupid mistake. My physical sciences score went up just by doing that-- I'm terrible at math, too.
