Ice sinks in methanol, but floats on water. From this we can conclude: A The density of ice in methanol must be different from that in water. B The density of water must be less than the density of methanol. C The density of ice must be greater than the density of water. D The density of methanol must be less than the density of water.

D The density of methanol must be less than the density of water.

Explanation:

Ice sinks in methanol, so the density of ice is greater than the density of methanol.

Ice floats in water, so the density of ice is less than the density of water.

Since the density of ice is the same in each case, the density of methanol must be less than the density of water.

ρ_methanol < ρ_ice < ρ_water

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.