Chapter 2 Diagnostic Name:

Your answer to questions 1-3 must contain the correct number of sig figs. (1 pts each)

  1. 575.00 ´ 4.00 =
  1. 490 + 7 =
  1. A toothpick is measured as 5.56 cm long. How long are exactly 3 of these toothpicks laid end to end?

For questions 4-5, you do not have to use fenceposting if you so choose. (1 pt each)

  1. 109 cm = ______m
  2. 1566 mm2 = ______km2

You must solve questions 6, 7 and 8 using fenceposting.

  1. Before 1965, dimes were made out of 90% silver and 10% copper, and weighed 2.5 grams each. The current price of silver is $20.80 per ounce. 1 ounce = 28.3 grams. If you went home and found $2.00 worth of these old dimes (according to their face value), what value of silver would you have? (4 pts)

2 glasses / = / 1 noggin / 2 gallons / = / 1 peck
4 noggins / = / 1 pint / 4 pecks / = / 1 bushel
2 pints / = / 1 quart / 8 bushels / = / 1 quarter
4 quarts / = / 1 gallon
  1. If you have 43 gallons of milk, how many glasses of milk do you have? (3 pts)
  1. If the density of a liquid is 3.5 kg/quart, what is the density in g/noggin? (4pts)
  1. Imagine that we did a lab about the density of platinum (actual density = 21.45 g/cm3). You measured the density of platinum three times and made the following data chart. While doing the write-up at home later that night, your bratty little brother sneaks into your room and erases a bunch of data from your data table.

Measurement 1 / 20.42 g/cm3
Measurement 2 / 24.90 g/cm3
Measurement 3
Average
Percent error / 4.74% too high
Average Deviation

Fill in the blanks of the incomplete data table. Show all calculations in the space below. (6 pts)

10. Why did we take three different measurements in the example above? (1 pt)