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What are the SI units for Mass
kg

What are the SI units for Volume
m(to the third)

What are the SI units for Temperature
K

What are the SI units for the Amount of Substance
mole

What is the equation for density
d=m/v

What is the equation for % error
% error=accepted value  experimental value/accepted value x 100

What is the equation for relitive error
relitive error=your largest density  your smallest density/your average density x 100

What is accuracy
the measurement of how close a measurement comes to the accepted/true value of whatever is being measured. It's compared to the true/accepted value.

What is precision
a measure of how close a series of measurements are to another. It's two or more repeated measurements.

% error is a measure of...
Accuracy

Relitive error is a measure of...
Precision

What are Significant Digits?
When taking any measurement, the number of sig. figs. is equal to the number of divisions on the measurement device, plus one more digit that is estimated.

What are the 5 Significant Digit Rules?
 1. Every nonzero digit is significamt
 2. Zeros between nonzero digits are significant
 3. Leftmost zeros infront of nonzero digits are not significant
 4. With digits to the right of a decimal point, zeros to the right of the last nonzero digit are significant
 5. If there is no decimal point, zeros to the left of the implied decimal point and before a nonzero digit ane not significant

If the number reflects an exactly defined quanity, such as reflected in a conversion factor...
then there an unlimited number of significant digits.

Adding and Subtracting of Significant Digits
addition subtraction=decimal points (not digits) as the measurement with the least number of decimal places.

Multiplication and Division of Significant Digits
multiplication division=significant digits as the measurement with the least number of sig. figs.

Significant Digit Rounding
 If number next to number to be rounded is 5 or greater, round up and vise versa.
 Example: 245.6 (only want 2 sig. figs.) = 250

What is specific gravity?
The specific gravity of a substance is a comparison of its density to that of water (1 mL). It's unit less.

What is buoyancy?
The ability of an object to float in a liquid. The buoyancy is determined by specific gravity.

What's the Kelvin equation?
K=C+273

What's the Celsius equation?
C=K273

What's the Fahrenheit equation?
 1. Add 40
 2. Conversion units factor (9 F/5 C)
 3. Subtract 40

