) (i) Salt water has greater density than fresh water. A boat floats in both fresh water and in salt water. Where is the buoyant force greater on the boat? (ii) If one material has a greater density than another, does this mean that the molecules of the first material must be more massive than those of the second? a) No b) Yes c) Salt water only d) Fresh water only e) The buoyant force is the same in both
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1) (i) Salt water has greater density than fresh water. A boat floats in both fresh water and in salt water. Where is the buoyant force greater on the boat? (ii) If one material has a greater density than another, does this mean that the molecules of the first material must be more massive than those of the second?
a) No
b) Yes
c) Salt water only
d) Fresh water only
e) The buoyant force is the same in both
2) A car goes around a curve of radius r at a constant speed v. Then it goes around a curve of radius 2r at speed 2v. (1) What is the
a) Twice as big
b) One- half as big
c) Remain the same
d) Four times as big
e) One fourth as big
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