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QOTD 9/25/13

QOTD 9/25/13. http://www.youtube.com/watch?v=0gU35Tgtlmg. Now time for the answers. Check your work as we go over these!. 1. Gold has a density of 19.3 g/ mL. The idol appears to have a volume of about 1500 mL. What is the mass? Show your work. 19.3 g/mL x 1500 mL = 28950 g

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QOTD 9/25/13

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  1. QOTD 9/25/13 http://www.youtube.com/watch?v=0gU35Tgtlmg

  2. Now time for the answers • Check your work as we go over these!

  3. 1. Gold has a density of 19.3 g/mL. The idol appears to have a volume of about 1500 mL. What is the mass? Show your work. • 19.3 g/mL x 1500 mL = 28950 g • That’s over 63 pounds! It sure looked light in the movie though. I don’t think Steven Spielberg knows much about density!

  4. 2. The density of sand is 1.6 g/mL. If the volume of sand is also 1500 mL, what is the mass of the sand? Show your work. • 1.6 g/mL x 1500 mL = 2400g • That’s about 5 pounds.

  5. 3. How many bags of sand would equal the mass of the gold idol? Show your work. • 28950 g x 1 sandbag/2400g = 12.0625 sandbags • Note: if we followed correct sig fig rules, you would round to 12 sandbags. (But we won’t be worrying about that in this class)

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