Unit factor practiceUnit factor practice

Dr. Robert M. MacKay

Clark College PhysicsClark College

Conversion of UnitsConversion of Units How many centimeters are in 2.50 kilometer? Write down know value draw a line to separate numerator from denominator use a unit factor conversion to go from one unit to next use unit analysis to keep track of units

Conversion of UnitsConversion of Units

How many centimeters are in 2.50 kilometer?

2.50 km

Conversion of UnitsConversion of Units

How many centimeters are in 2.50 kilometer?

2.50 km1000m

1.00 km

Conversion of UnitsConversion of Units

How many centimeters are in 2.50 kilometer?

2.50 km1000m

1.00 km

100 cm

1.00m= 2.50x105 cm

Conversion of UnitsConversion of Units

How many cm3 are in 300 in3 kilometer?

300 in3

Conversion of UnitsConversion of Units

How many cm3 are in 300 in3 kilometer?

300 in3

(1.00 in)3

(2.54 cm)3

Conversion of UnitsConversion of Units

How many cm3 are in 300.0 in3 kilometer?

300.0 in3

1.00 in3

16.39 cm3

= 4916 cm3

Conversion of UnitsConversion of Units What is the volume in m3 of a rectangular cube that has dimensions of: L= 40.08 in W= 30.0 in h= 25.7 in? Hint: 1.00 m =3.28 ft

Conversion of UnitsConversion of Units

How many miles per hour is 40 m/s?

Conversion of UnitsConversion of Units

How many miles per hour is 40 m/s?

40.0(m / s)2.24(mi / hr)

1.0(m / s)89.6mi / hr

Conversion of UnitsConversion of Units

How many miles per hour is 40 m/s?

40.0m

s

1.0mile

1609m

3600s

1hr89.6mi / hr

Conversion of UnitsConversion of Units How many kcal are in 3.00x108 kWh? 4.186 J=1 cal 3.60x106 J =1.00 kWh