PHYS 1114 Chapter 10 Misconceptual Questions
Hot air is less dense than cold air. Could a hot-air balloon be flown on the moon, where there is no atmosphere?
No, there is no cold air to displace, so no buoyancy force would exist.
How is the smoke drawn up a chimney affected when a wind is blowing outside?
Smoke rises more rapidly in the chimney
Three containers are filled with water to the same height and have the same surface area at the base, but the total weight of water is different for each. In which container does the water exert the greatest force on the bottom of the container?
all three are equal
As water flows from a low elevation to a higher elevation through a pipe that changes in diameter...
d) need more information to determine how the water pressure changes?
A rowboat floats in a swimming pool, and the level of the water at the edge of the pool is marked. Consider the following situations. i) The boat is removed from the water. ii) The boat in the water holds an iron anchor which is removed from the boat and placed on the shore. For each situation, the level of water will...
fall
When a baseball curves to the right, air is flowing...
faster over the right side than over the left side
Water flows in a horizontal pipe that is narrow but then widens and the speed of the water becomes less. The pressure in the water moving in the pipe is...
greater in the wide part
You put two ice cubes in a glass and fill the glass to the rim with water. As the ice melts, the water level...
remains the same
Why does an ocean liner float?
the average density of the ocean liner is less than that of seawater
Beaker A is filled to the brim with water. Beaker B is the same size and contains a small block of wood which floats when the beaker is filled with water to the brim. Which beaker weighs more?
the same for both
An object that can float in both water and in oil (whose density is less than that of water) experiences a buoyant force that is...
the same when it is floating in water or in oil
You hold a piece of wood in one hand and a piece of iron in the other. Both pieces have the same volume, and you hold them fully under water at the same depth. At the moment you let go of them, which one experiences the greater buoyancy force?
they experience the same buoyancy force