Unit Conversion: - Portland Community College
Scientific Notation:
Express the following numbers in scientific notation:
a) 543
b) 20,000,000
c) 12,000.0
d) 0.0000230
e) 0.0012
Significant Figures:
Determine the number of significant figures in the following measurements:
a) 2.303 meters
b) 5.50 seconds
c) 0.024 liters
d) 24.3 kilograms
e) 115.20 centimeters
f) 100 miles/hour
Significant Figures (cont.):
Perform the following and express your answers using the appropriate number of significant figures:
a) 22.5 + 0.023 =
b) 100 - 25 =
c) 12.003 * 2.5 =
d) 50.45 / 0.02 =
e) 2.5 x 6.022 * 1023 =
Unit Conversion:
Convert the following quantities and express your answers using the appropriate number of significant figures:
a) 2.3 feet = ______ meters
b) 5.50 minutes = _______ seconds
c) 2.4 hours = ________ seconds
d) 24.3 miles = ________ meters
e) 115.2 centimeters = _________ feet
f) 55 mph = ________ km/hr
g) 100.0 km/hr = _________ m/s
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