today, some people throw a topic, it is estimated that the interview was asked or the written test met, and then smashed boiling in the group. There are all kinds of answers. The answer to a and B is too much.
in a pond floating a wooden boat with stones, when the stones were thrown into the pond, the Stones sank and asked how the height of the water in the pond would change.
A, Rise
B, Descent
C, unchanged
D, unable to judge
I think the answer is B, here is the explanation, such as not the correct welcome to shoot bricks.
The volume of the stone in the ship's discharge is greater than the volume of the stone itself, put the stone into the water, the water level should be down.
Of course, the premise here is that the density of the
stone is greater than the density of the water. do not rule out the presence of stones that are less dense than water (things that do not belong to the normal world).
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In a pond floating a wooden boat with stones, when the stones were thrown into the pond, the Stones sank and asked how the height of the water in the pond would change.
