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Why do helium balloons rise?
helium is less dense than air around it
What factor affects the density of an egg that is placed in a glass of salt water and it floats but in fresh water it sinks?
adding a substance
What is the mass of a substance compared to the mass of equal volume of water?
specific gravity
How are the particles in a solid packed compared to particles in a liquid?
more tightly packed
Of the following densities, which one will sink to the bottom? 1, 1.25, 0.9, 0.81
1.25
What does specific gravity compare the density of a substance to?
water
What is the volume of an object if the density is 5 g/mL and the mass is 25 g?
5 mL
What is the mass of an object if the density is 2 g/ml and the volume is 20 mL?
40 g
What is the density of an object if the mass is 40 g and the volume is 20 mL?
2 g/mL
What is the formula for finding the density of an object?
d=m/v
What is the specific gravity of pure water?
1 g/cm3
If an object has a density of 0.2 g/cm3, what does it do when placed in a liquid that has a density of 0,84 g/cm3?
it floats
What happens to solid water when it is placed in liquid water?
floats to top, less dense
If a can of diet cola floats in water, what is its specific gravity?
less than 1
What happens to substances that are less dense than water?
they float
What could you say about the density of a ball that is in a container with 3 liquids of different densities where the ball floats in the 2nd layer?
density of ball is equal to 2nd layer
What 2 measurements do you need to find the density of a brick?
mass and volume