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DerKrebs [107]
4 years ago
14

A girl throws a rock into a pond. A leaf floating on the pond bobs up and down but does not change location on the pond's surfac

e. Why not?
Chemistry
1 answer:
sertanlavr [38]4 years ago
6 0

This is due to the difference in density. The rock is denser than the leaf. And also, the rock is denser than the liquid in the pond. If the material is denser than the other material, it will sink. The same holds true for the rock, it sinks. But when the material is less dense than the other material, it floats. And it holds true for the leaf, it floats.

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A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.

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Explanation:

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5 0
3 years ago
PLEASE HELP!!!
algol [13]
Question 1 answer: A

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8 0
4 years ago
Does warm air or cool air hold more humidity.​
Tanzania [10]

Answer:

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Explanation:

5 0
3 years ago
Read 2 more answers
A coin collector has a bag of 50 pennies. What is weighted average of a penny in the sample according to the data?
Lisa [10]

The weighted average of a penny is = 67.9g

<h3>Calculation of average weight</h3>

The sample of penny for pre 1982 is a total of = 18 pennies.

The mass of each penny for pre 1982 = 3.1

Therefore the total weight for penny for pre 1982

= 18×3.1

= 55.8

The sample of penny for post 1982 is a total of = 32 pennies.

The mass of each penny for post 1982 = 2.5

Therefore the total weight for penny for post 1982

=32×2.5

= 80

The weighted average

= 55.8+80/2

= 135.8/2

= 67.9g

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7 0
2 years ago
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