Physics Quiz

What is the mass of a sample of a substance with a volume of 120 mL and a density of 0.75 g/mL?

• 90 g

• 110 g

• 100 g

• 120 g

A cold air mass meets a warm air mass. Explain what will happen, in terms of the differences in their densities.

• The cold air mass will rise above the warm air mass

• The two air masses will mix together

• There will be no effect on the air masses

• The warm air mass will sink below the cold air mass

For each item listed, fill in what its weight would be on the moon.

• Apple: 150 g, Hammer: 1.5 lbs, Person: 180 lbs, Blue whale: 200 tons

• Apple: 25 g, Hammer: 0.25 lbs, Person: 30 lbs, Blue whale: 33.2 tons

• Apple: 100 g, Hammer: 1 lbs, Person: 120 lbs, Blue whale: 132 tons

• Apple: 75 g, Hammer: 0.75 lbs, Person: 90 lbs, Blue whale: 100 tons

Your teacher sets two cups on a bench at the front of the class. One contains water dyed blue and the other clear water. You must figure out which is which. How would you do this?

• Taste the water in each cup

• Smell the water in each cup

• Pour the water from one cup into the other to see if the color changes

• Ask the teacher for the answer

Archie needs to find the density of an intricately crafted crown, to see if it is pure gold. He has no trouble measuring the mass, but he doesn't know what to do next. What should he do?

• Weigh the crown on a different planet to compare the weight

• Ask a jeweler to determine the density

• Heat the crown and observe its reaction to determine its purity

• Measure the volume of the crown and divide the mass by the volume