# Physics Math - rowan.k12.ky.us

Physics Math Scientific Notation and Metric Conversions To convert from one unit to another

Start every problem with a ? The ? means How many? For example, Convert 152cm to _______m, becomes ? m = 152 cm

Conversion Factors Statements of fact expressed as a fraction equaling 1. When using conversion factors You will need to know the conversion fact

first! For example, the fact is 1m = 100cm Expressed as a conversion factor, it is: 1m or 100cm

100cm 1m *When deciding which to use, set it up so that the units cancel each other! Example #1:

On your white board, set up the problem: ? m = 152cm x ___________ Hint: When you plug in the fact, you must place cm so they will cancel out! Example #2:

Convert 62kg to g. Hint: -Start with a ? and unit you dont know yet. -Set up units so they will cancel. -Plug in the conversion fact and do the math!

Example #3: Convert 1700 us to ds. In this case, you will need two steps. First, convert us to s. Then, convert s to ds.

Example #4: 0.0056mm = __________ km Hint: Convert mm to m, then m to km. A few more rules! When converting between units, always

write the numerator and denominator on separate lines! Makes cancelling easier! Example: Convert 310km/h to mi/h. WRONG WAY ?mi/h = 310km/h CORRECT ?mi

h = 310km x h Conversion fact: 1 km = .62 mi

mi km Example #5: Convert 570 g/L to g/mL.

Example #6: Convert 16 m/min to m/s. Example #7: Convert 65 km/h to m/s.

To begin with: Step 2: Take care of km first. Step 3: Now, convert time.

Lets Check http://www.gpb.org/chemistry-physics/physic s/103 (12:00)

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