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A grape floats in corn syrup. This means that
the density of the grape is less than the density of the corn syrup.
there is more buoyant force in the grape than in the corn syrup.
the density of the grape and the corn syrup must be approximately equal.
the grape must have less mass than the corn syrup.
Which will not increase the buoyancy of a metal boat?
Make the boat longer and narrower
Make the boat wider
Make the hull (lining) of the boat thinner
Create more air tanks in the boat
When a submarine fills its ballast tanks with surface ocean water it can hover in the water but it does not sink to the ocean floor. Why?
Warm surface ocean water is less dense than deeper colder ocean water
The shape of a submarine resists the water and therefore floats on top
The ocean has a much wider surface area than the submarine and therefore is more buoyant than the submarine
The colder deeper water has a higher viscosity and therefore resists objects as they attempt to enter it
Which statement about density is false?
Ice sinks in water because it is colder and therefore it is denser
A substance can have different densities, depending on its temperature
With the same number of particles in a larger volume, density decreases
A substance is usually most dense in its solid state
250 mL of an unknown sample weighs 200 g. What is its density?
0.8 g/mL
1.25 g/mL
50 g/mL
450 g/mL
What is the unit for measuring the density of a solid?
g/cm³
kg/L
mg/L
g/mL
The following graph shows the densities of some unknown samples.
Which sample is most dense?
Sample A
Sample B
Sample C
Sample D
The following graph shows the densities of some unknown samples.
If sample C were vegetable oil, which sample would float on top of it?
Sample D
Sample A
Sample B
None of the other samples would float on it
If the density of an unknown sample is 1.2 g/cm³, how much mass would a 10 cm³ sample contain?
12 grams
8.3 grams
0.12 grams
0.2 grams
The Bermuda triangle has fascinated people for decades. One explanation for the disappearances of ships in that area has focused on the presence of vast fields of methane hydrates on the continental shelves. Laboratory experiments carried out in Australia have proven that bubbles of this gas can decrease the density of seawater. This means missing ships may have
