SC 130 Physical Science | Quiz 01 sample answers
Where appropriate, include units!
- Name three fundamental physical quantities and the units used to measure those quantities.[other answers possible but not likely at this point in the term]
- length , meters
- mass , kilograms
- time , seconds
- Name three derived quantities and the units used to measure those quantities.[other answers possible]
- speed , meters/second
- pace , minutes/kilometer
- density , grams/cm3
- 1.7 meters | What is your height in meters? [for example!]
- 67 kilograms | What is your mass in kilograms? [for example!]
- 17483 days | How many days old are you? [for a fortysomething example!]
- 0.461 hours On Wednesday evening I ran 4.68 kilometers in 27 minutes and 38 seconds. Use dimensional analysis to convert 27 minutes and 38 seconds to hours. Show your dimension analysis work. [not included herein]
- 10.2 km/hour Use your work above to calculate my speed in kilometers per hour.
- 5.90 minutes/kilometer Runners do not think in terms of speed. Runners think in terms of pace. Speed is the distance per unit time. Pace is the time per unit distance. Runners divide the time in minutes by distance in kilometers to determine their pace. Convert 27 minutes and 38 seconds to minutes using dimensional analysis and divide by 4.68 kilometers to determine my pace on Wednesday evening in minutes per kilometer.
- 230 cm3 A box of Yardley London Flowering English Lavender soap is 9.6 cm long by 3.9 cm thick by 6.1 cm wide. Calculate the volume of the box, writing the answer using the correct number of significant digits.
- 0.55 gm/cm3 Density is mass per unit volume. The Yardley soap in a box is 125 grams including the box and the soap. Divide the mass in grams by the volume in cubic centimeters calculated above and report the density using the correct number of significant digits.