Answer:
Explanation:
If an object has a higher density than the fluid it is in (fluid can mean liquid or gas), it will sink. If it has a lower density, it will float. Density is determined by an object's mass and volume. If two objects take up the same volume, but have one has more mass, then it also has a higher density.
A. nucleus
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Answer:
Nodes.
Explanation:
Nodes are a point that are on a standing wave that never move.
Answer:
20m/s
Explanation:
it covers 20 metres in a second
it is true. the trajectory reaches the value of zero at the top
