1027 Chapter 2

# 1027 Chapter 2 - Chapter 2 Measurements Terms Qualitative...

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Chapter 2 Measurements

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Terms Qualitative measurements Nonnumeric observations What is present? Appearance Quantitative measurements Numerical observations Numerical data Distance from Philadelphia to NY Temperature water boils
International System of Units, SI Adopted by scientists for uniformity of units throughout the world Length (meter, m) = 1.094 yd = 39.37 in. 1 in. = 2.54 cm 1 mile = 1.609 km Area; length x width = meter x meter = m x m = m 2 Volume (cubic meter, m 3 ) volume of a cube with sides 1 cm in length 1 m 3 = 1000 L 1 L = 1000 mL = 1.057 qt

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Mass (Kilogram, kg) 1 kg = 1000 g = 2.205 lb 1 lb = 453.6 g Temperature (Celsius, o C) scale water freezes @ 0 o C, water boils @ 100 o C Kelvin, K scale K = o C + 273.15 Time (Second, s)
Metric System and SI Prefixes Prefix Symbol Meaning Factor Tera T trillion 10 12 Giga G billion 10 9 Mega M million 10 6 Kilo k thousand 10 3 Deci d 0.1 10 -1 Centi c 0.01 10 -2 Milli m 0.001 10 -3 Micro m 0.000 001 10 -6 Nana n 0.000 000 001 10 -9 Pico p 0.000 000 000 001 10 -12

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Exercise Which of the quantities in each of the following pairs is larger? millimeter, centimeter picometer, micrometer kilogram, centigram decimeter, millimeter
Which of the quantities in each of the following pairs is larger? millimeter, centimeter centimeter picometer, micrometer micrometer kilogram, centigram kilogram decimeter, millimeter decimeter

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Give the names of each of the following quantities 0.1 g 0.001 L 0.000 001 s 0.01 g 0.000 000 000 001 s
Give the names of each of the following quantities 0.1 g decigram 0.001 mL milliliter 0.000 001 s microsecond 0.01 g centigram 0.000 000 000 001 s picosecond

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Temperature Scale o F = o C + 32 = 1.8 o C + 32 o C = o K = o C + 273.15 o C = K – 273.15 5 9 32 1.8 F -
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1027 Chapter 2 - Chapter 2 Measurements Terms Qualitative...

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