R is the universal gas constant, which is found with one of three formulas depending on what your pressure is measured in.
if you're measuring in ATM (atmospheres) then it is:
.0821*(L ATM/ mole K)
to switch any other type of pressure to atmospheres, you use the formula,
1.00 ATM = 101.3 kPa = 760 mmHg = 760 torr.
if you don't feel like converting, look up universal gas constant formulas on Google, you should be able to find something.
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r is a letter used to show the lenth, height, angle degree or point ect so it doesn't really stand for anythin ex a 5 by r rectangle r = the lenght and could tequniqally be any #
7 houses of rome
Rosa is 10. -- further-- This is calculated by working out the relationship between the children. Let's call Rosa "R" and let that stand for her age. The next child is R + 2 years old and the eldest if R + 4. We are told that R + (R + 2) + (R + 4) = 36 (add the Rs and the digits on the left) R + R + R + 2 + 4 = 36 3R + 6 = 36 (subtract 6 from both sides) 3R = 36 - 6 3R = 30 (divide both sides by 3) R = 10According to the information given, Rosa is ten years old.
Minus pi. Or minus pi plus any rational number. Here is how you can figure this out (call your unknown number "x", and let "r" stand for any rational number):x + pi = r To solve for "x", simply subtract pi from both sides. That gives you: x = r - pi
Whatever it want's to stand for