3 2 and 3 3 Conversion Problems More

3. 2 and 3. 3 Conversion Problems More Calculations!

Metric Conversion Practice • • • 7. 246 kg to decigrams Answer: 72460 or 7. 246 X 104 dg 35. 2 km to meters Answer: 35200 or 3. 52 X 104 m 24. 80 m. L to da. L Answer: 0. 002480 or 2. 480 X 10 -3 da. L

Domino Activity • Always start with zero on the bottom • Match numbers diagonally until you reach the number on the bag • Switch bags with another group and try again

Definitions • Dimensional Analysis Converting from one unit to another…uses a… • Conversion Factor - Ratio of Equivalent Measurements – Changes the numerical value, but not the size of the quantity

Steps 1. List Unknown (? = _) 2. Make a list of knowns (dominoes) 3. Write down the number and unit you’re starting with 4. Use knowns to match units diagonally until you’re left with the needed unit(s)

Practice. • Convert 3, 549 seconds to years • Answer: 0. 0001125 or 1. 125 X 10 -4 years • Convert 15. 0 miles to inches (hint: there are 5280 ft in a mile) • Answer: 9. 50 X 105 inches • Convert 320 k. Pa to mm Hg • Answer: 2400 or 2. 4 X 103 mm Hg

Practice • • Convert 3. 458 calories to Joules. Answer: 14. 47 J Convert 0. 8320 Joules to calories. Answer: 0. 1988 cal

Helpful Conversions • • 1 m. L = 1 cm 3 5280 ft = 1 mi 1 ton = 2000 lbs. 1 mi = 1. 609 km • **See section 3. 2 for more!

Converting TWO Units • Pick the top or bottom to start with and complete those steps before moving onto the other. • Example: I can drink 3 Liters of milk per day. If there are 4 quarts per liter, how many quarts per week is that? • Answer: 84 qts/wk.

More Practice • Convert 45 mi per hr to km per s (there is 1 mi in 1. 609 km) • Answer: 0. 020 or 2. 0 X 10 -2 km/s • 52. 80 k. L per hour to m. L per second • Answer: 14, 670 or 1. 467 X 104 m. L/s