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3:571.1 | Explain how you could experimentally determine whether the outside temperature is higher or
A 4-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.1 of OpenStax Chemistry 2e step by step.
5:051.1 | The speed limit on some interstate highways is roughly 100 km/h. (a) What is this in meters
A 5-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.1 of OpenStax College Physics 2e step by step.
7:091.11 | How does a homogeneous mixture differ from a pure substance? How are they similar?
A 7-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.11 of OpenStax Chemistry 2e step by step.
3:491.11 | Suppose that your bathroom scale reads your mass as 65 kg with a 3% uncertainty. What is the
A 4-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.11 of OpenStax College Physics 2e step by step.
6:451.13 | A car speedometer has a 5.0% uncertainty. What is the range of possible speeds when it reads
A 7-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.13 of OpenStax College Physics 2e step by step.
5:381.13 | How do molecules of elements and molecules of compounds differ? In what ways are they
A 6-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.13 of OpenStax Chemistry 2e step by step.
5:371.15 | Many of the items you purchase are mixtures of pure compounds. Select three of these
A 6-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.15 of OpenStax Chemistry 2e step by step.
10:191.15 | Suppose that a person has an average heart rate of 72.0 beats/min. How many beats does he or
A 10-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.15 of OpenStax College Physics 2e step by step.
8:241.17 | Classify each of the following as an element, a compound, or a mixture: (a) iron (b) oxygen
A 8-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.17 of OpenStax Chemistry 2e step by step.
3:191.17 | State how many significant figures are proper in the results of the following calculations:
A 3-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.17 of OpenStax College Physics 2e step by step.
4:291.19 | How are the molecules in oxygen gas, the molecules in hydrogen gas, and water molecules
A 4-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.19 of OpenStax Chemistry 2e step by step.
7:361.19 | If your speedometer has an uncertainty of 2.0 km/h at a speed of 90 km/h, what is the percent
A 8-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.19 of OpenStax College Physics 2e step by step.
17:071.21 | A person measures his or her heart rate by counting the number of beats in 30 s. If 40 ± 1
A 17-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.21 of OpenStax College Physics 2e step by step.
6:041.21 | Prepare a list of the principal chemicals consumed and produced during the operation of an
A 6-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.21 of OpenStax Chemistry 2e step by step.
3:141.23 | If a marathon runner averages 9.5 mi/h, how long does it take him or her to run a 26.22-mi
A 3-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.23 of OpenStax College Physics 2e step by step.
7:151.23 | When elemental iron corrodes it combines with oxygen in the air to ultimately form red brown
A 7-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.23 of OpenStax Chemistry 2e step by step.
6:211.25 | Yeast converts glucose to ethanol and carbon dioxide during anaerobic fermentation as
A 6-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.25 of OpenStax Chemistry 2e step by step.
11:051.25 | The sides of a small rectangular box are measured to be 1.80 ± 0.01 cm , 2.05 ± 0.02 cm, and
A 11-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.25 of OpenStax College Physics 2e step by step.
5:521.27 | Classify each of the following changes as physical or chemical: (a) condensation of steam
A 6-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.27 of OpenStax Chemistry 2e step by step.
9:411.27 | The length and width of a rectangular room are measured to be 3.955 ± 0.005 m and 3.050 ±
A 10-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.27 of OpenStax College Physics 2e step by step.
6:121.29 | How many heartbeats are there in a lifetime?
A 6-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.29 of OpenStax College Physics 2e step by step.
3:431.29 | The volume of a sample of oxygen gas changed from 10 mL to 11 mL as the temperature changed.
A 4-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.29 of OpenStax Chemistry 2e step by step.
5:071.3 | Identify each of the following statements as being most similar to a hypothesis, a law, or a
A 5-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.3 of OpenStax Chemistry 2e step by step.
2:461.3 | Show that 1.0 m/s = 3.6 km/h. Hint: Show the explicit steps involved in converting 1.0 m/s
A 3-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.3 of OpenStax College Physics 2e step by step.
5:371.31 | Explain the difference between extensive properties and intensive properties.
A 6-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.31 of OpenStax Chemistry 2e step by step.
5:081.31 | How many times longer than the mean life of an extremely unstable atomic nucleus is the
A 5-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.31 of OpenStax College Physics 2e step by step.
3:441.33 | Approximately how many atoms thick is a cell membrane, assuming all atoms there average about
A 4-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.33 of OpenStax College Physics 2e step by step.
7:571.33 | The density (d) of a substance is an intensive property that is defined as the ratio of its
A 8-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.33 of OpenStax Chemistry 2e step by step.
5:091.35 | Calculate the number of cells in a hummingbird assuming the mass of an average cell is ten
A 5-minute physics worked example from The Glaser Tutoring Company, solving exercise 1.35 of OpenStax College Physics 2e step by step.
4:221.35 | Is a meter about an inch, a foot, a yard, or a mile?
A 4-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.35 of OpenStax Chemistry 2e step by step.
7:011.37 | Indicate the SI base units or derived units that are appropriate for the following
A 7-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.37 of OpenStax Chemistry 2e step by step.
9:111.39 | Give the name of the prefix and the quantity indicated by the following symbols that are used
A 9-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.39 of OpenStax Chemistry 2e step by step.
15:421.41 | Visit this PhET density simulation (http://openstaxcollege.org/l/16phetmasvolden) and select
A 16-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.41 of OpenStax Chemistry 2e step by step.
16:461.43 | Visit this PhET density simulation (http://openstaxcollege.org/l/16phetmasvolden) and select
A 17-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.43 of OpenStax Chemistry 2e step by step.
11:071.45 | Express each of the following numbers in exponential notation with correct significant
A 11-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.45 of OpenStax Chemistry 2e step by step.
7:331.47 | Indicate whether each of the following can be determined exactly or must be measured with
A 8-minute chemistry worked example from The Glaser Tutoring Company, solving exercise 1.47 of OpenStax Chemistry 2e step by step.