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문제 61a
Complete the table. a. 1245 kg _ 1.245×106 g _ 1.245×109 mg
문제 61b
Complete the table. b. 515 km _____dm _____cm
문제 61c
Complete the table. c. 122.355 s _____ms _____ks
문제 61d
Complete the table. d. 3.345 kJ _____J _____mJ
문제 62a
Complete the table. a. 355 km/s _____cm/s _____m/ms
문제 62b
Complete the table. b. 1228 g/l _____g/ml _____kg/ml d. 2.554 mg/ml _____g/l _____mg/ml
문제 62c
Complete the table. c. 554 mK/s _____K/s _____mK/ms
문제 63
Express the quantity 102,455 m in each unit. a. km b. Mm c. mm d. cm
문제 64
Express the quantity 128.2 * 10 - 12 s in each unit. a. ms b. ns c. ps d. fs
문제 65
How many 1-cm squares would it take to construct a square that is 1 m on each side?
- How many 1-cm cubes does it take to construct a cube that is 4 cm on each edge?
문제 66
문제 67
A new penny has a mass of 2.49 g and a volume of 0.349 cm3. Is the penny made of pure copper? Explain your answer.
문제 68
A titanium bicycle frame displaces 0.314 L of water and has a mass of 1.41 kg. What is the density of the titanium in g/cm3?
문제 69
Glycerol is a syrupy liquid often used in cosmetics and soaps. A 3.25 L sample of pure glycerol has a mass of 4.10×103 g. What is the density of glycerol in g/cm3?
문제 70
A supposedly gold nugget displaces 19.3 mL of water and has a mass of 371 g. Could the nugget be made of gold?
문제 71a
Ethylene glycol (antifreeze) has a density of 1.11 g>cm3. a. What is the mass in g of 226 mL of ethylene glycol? b. What is the volume in L of 4.2 kg of ethylene glycol?
문제 71b
Ethylene glycol (antifreeze) has a density of 1.11 g>cm3. a. What is the mass in g of 226 mL of ethylene glycol? b. What is the volume in L of 4.2 kg of ethylene glycol?
문제 72
Acetone (nail polish remover) has a density of 0.7857 g>cm3. a. What is the mass in g of 12.55 mL of acetone? b. What is the volume in mL of 9.12 g of acetone?
문제 73
A small airplane takes on 245 L of fuel. If the density of the fuel is 0.821 g/mL, what mass of fuel has the airplane taken on?
문제 74
Human fat has a density of 0.918 g/cm3. How much volume (in cm3) is gained by a person who gains 10.0 lb of pure fat? the reliability of a Measurement and Significant Figures
문제 78a
Read each measurement to the correct number of significant figures. Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
문제 78b
Read each measurement to the correct number of significant figures. Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
문제 78c
Read each measurement to the correct number of significant figures. Laboratory glassware should always be read from the bottom of the meniscus. Digital balances normally display mass to the correct number of significant figures for that particular balance.
문제 79
For each number, underline the zeroes that are significant and draw an x through the zeroes that are not. a. 1,050,501 km b. 0.0020 m c. 0.000000000000002 s d. 0.001090 cm
문제 82c
How many significant figures are in each number? c. 1.563300 * 1011 m
문제 82d
How many significant figures are in each number? d. 4,100 km
문제 83a
Which numbers are exact (and therefore have an unlimited number of significant figures)? a. π = 3.14 c. EPA gas mileage rating of 26 miles per gallon d. 1 gross = 144
문제 83b
Which numbers are exact (and therefore have an unlimited number of significant figures)? b. 12 in = 1 ft
문제 86
Round each number to three significant figures. a. 79,845.82 b. 1.5148937×107 c. 1.13499999995 d. 0.0000415389
문제 87a
Calculate to the correct number of significant figures. a. 97.530 * 4.020 / 100.04