CH101 chap E

length

Meter

1 meter =___

39.37 inches

Mass

Kilogram

1 kg=___lbs

2.2 pounds

Time

Second

Temperature

Kelvin

How to find Kelvin?

C°+ 273.15

How to get kelvin from F°

F°+ 255.372

0*.004004500

Not significant

0.0×0×4004500

Not significant, zeros used to locate the decimal point

0.004×004×5×00

Significant, all non zero numbers

0.00400450×0*

Significant, zeros at the end of a number to the right of the decimal point

When does a number have an unlimited number of sig figs?

What it is an exact relationship. Ex: 100cm in 1m

How many sigfigs in 0.040 ?

2

How many sig figs in 2.50×10^5

3

When multiplying and dividing, what is important about how many sig figs are in the result?

The result must have the same amount of sig figs as the factor with the fewest sig figs

When adding or subtracting, what is important about the result?

The result has the same number of decimal places as the factor with the fewest decimal places

1cm³ =

1 mL

Volume =

M³

Velocity

m/s

D=

M/V

What is the density of water?

1 g/mL

KE=

mv²/2

1 joule =

(1 kg)(m²/s²)

Endothermic

Heat goes into system, typically surrounding temp goes down

Enxothermic

Heat goes out of system, energy of system decreases, surrounding temp goes up

How many J in one Cal?

4.184

How many kJ in 1 J?

1000

M

10^6

k

10³

m

10^-3

mew

10^-6

n

10^-9

p

10^-12