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4 years ago

3. Pedro threw a penny into a fountain and it sank to the bottom. Which of the following would explain

Physics

2 answers:

solong [7]4 years ago

4 0

Answer:

Explanation:

A is not correct as there is much more water then penny meaning the water has more mass. The same can be said about C as the water also has more volume. Answer D is incorrect as the temperature of the penny is irrelevant to its ability to sink. That leaves us with option B, which is true as the penny is composed of metal allowing it to sink in the water due to having more density.

____ [38]4 years ago

3 0

Answer:

its B because we're not talking about mass even tho most people would have chosen A cuz it says mass and u they would think its apart of density but if ur testing to see density ur figuring out which object will sink and which one will float so da reason why da penny snuck it cuz da density is greater den da water and copper has a better chance of sinking den floating so dats why its B I hope dis helps :3

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The magnitude of the sum of the frictional forces acting on the bike and its rider is 400N.

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The friction force is the opposing force which acts on the object which is in relative motion.

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The friction force between rider and bike is zero.

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Thus, the magnitude of the sum of the frictional forces acting on the bike and its rider.

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Answer:

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