Indicate to what decimal position readings should be estimated and recorded (nearest 0.1 , 0.01 , etc .) for measurements made with the following devices: a. A ruler with a smallest scale marking of 0.1 cm b. A measuring telescope with a smallest scale marking of 0.1 mm c. A protractor with a smallest scale marking of 1 ° d. A tire pressure gauge with a smallest scale marking of 1 lb / in 2.
Indicate to what decimal position readings should be estimated and recorded (nearest 0.1 , 0.01 , etc .) for measurements made with the following devices: a. A ruler with a smallest scale marking of 0.1 cm b. A measuring telescope with a smallest scale marking of 0.1 mm c. A protractor with a smallest scale marking of 1 ° d. A tire pressure gauge with a smallest scale marking of 1 lb / in 2.
Solution Summary: The author explains that significant figures are used to express a measurement in scientific notation.
Indicate to what decimal position readings should be estimated and recorded (nearest
0.1
,
0.01
,
etc
.) for measurements made with the following devices:
a. A ruler with a smallest scale marking of
0.1
cm
b. A measuring telescope with a smallest scale marking of
0.1
mm
c. A protractor with a smallest scale marking of
1
°
d. A tire pressure gauge with a smallest scale marking of
1
lb
/
in
2.
A. The Internal System of Units
Fill in the space provided with the correct SI units and symbol for each quantity.
Quantity
Unit
Symbol
Length
Mass
Time
Electric current
Temperature
Amount of substance
Luminous intensity
B. The Metric System
Convert the following figures to its desired units. Do not round off your answers.
1. 23 m to
2. 76 L to
3. 93.2 mg to
4. 83.34 dL to
5. 94.1 Dm to
6. 12 cm to
7. 164,000 ml to
8. 454 g to
9. 1,232 kg to
10. 672 L to
km
DL
Hg
mm
mg
m
kL
Calculate the areas and densities. Report the answers in the correct units.a. the area of a rectangle with sides measuring 3 × 1 0 1 cm and 3 × 1 0 -2 cmb. the area of a rectangle with sides measuring 1 × 1 0 3 cm and 5 × 1 0 -1 cmc. the density of a substance having a mass of 9 × 1 0 5 g and a volume of 3 × 1 0 -1 c m 3d. the density of a substance having a mass of 4 × 1 0 -3 g and a volume of 2 × 1 0 -2 c m 3
Homework and Exercises 1.53 and 1.56
53. Convert the following Fahrenheit temperatures to the Celsius and
Kelvin scales.
a. -459°F, an extremely low temperature
b. -40.°F, the answer to a trivia question
c. 68°F, room temperature
d. 7 X 107 °F, temperature required to initiate fusion reactions
in the sun
56. Convert the following Kelvin temperatures to Celsius and
Fahrenheit degrees.
a. the temperature that registers the same value on both the
Fahrenheit and Celsius scales, 233 K
b. the boiling point of helium, 4 K
Chapter 1 Solutions
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General, Organic, and Biological Chemistry (3rd Edition)
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