PHYSICS MIDDLE SCHOOL

3. Explain A friend notices that a nail that was left outside for a few month:seems larger and heavier than it was before. He says the nail is rusting disproves the Law of Conservation of Mass. Explain why he is wrong.

Answers

Answer 1
Answer:

According to the law of conservation of mass of reactants before the reaction must be equal to the mass of the product. He is wrong because the nail is undergoing the process of rusting and after the rusting process mass of the product is increasing.

what is the law of conservation of mass?

According to the law of conservation of mass of reactants before the reaction must be equal to the mass of the product.

What is rusting?

Rusting is a form of oxidation. Rust is formed when iron combines with water and oxygen to generate hydrated ironoxide. Which is given by.

2Fe + 3O_2= Fe_2O_3

Nail contains iron when combined with oxygen results in the formation of ferrous oxide which is heavier than iron. That's why the mass of the product is more than the mass of reactants. ]

Hence after a few months seems larger and heavier than it was before.

To learn more about rusting refer to the link;

brainly.com/question/973790

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Can someone help me number five idk if im correct

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Gravity is the force that attracts a object to the center of the earth.
yes your correct. :)

Freshwater leeches attach to fish and suck blood from the fish to extend periods of time. This results in sores on the fish that often become infected . This relationship is best described as?

Answers

Answer:

Parasitism.

Explanation:

Parasitism, in biology, is defined as a relationship between different species, formed by a parasite and a host. So, basically the parasite lives in or on the host, causing it harm. Parasites can be describe as predators that eat less than one prey unit, that is, they feed them selves slowly, they don't kill the prey instantly as actual predators do.

So, in this case, we are talking about leeches, which are defined as parasitic worms which lives in freshwater environments. They feed themselves by sucking blood from the host.

Therefore, the relation between these two species is Parasitism.
parasitism i think  because they dont feed of dead animals or it would be predation

Human impact on one system leads to changes in more of Earth’s systems.   Please select the best answer from the choices provided T F

Answers

Answer;

The above statement is true

Human impact on one system leads to changes in more of Earth’s systems.  

Explanation;

Events can occur naturally, such as an earthquake or a hurricane, or they can be caused by humans, such as an oil spill or air pollution. An event can cause changes to occur in one or more of the spheres, and/or an event can be the effect of changes in one or more of Earth's four spheres.

Human impact on one system leads to changes in more of Earth’s systems because things like carbon and methane emissions affect the environment, which affects all plant and animal life.  

The statement "Human impact on one system leads to changes in more of Earth’s systems." is a true statement. This is further explained below.

What are Earth’s systems?

The Earth's five systems

  • geosphere
  • biosphere
  • cryosphere
  • hydrosphere
  • atmosphere

combine to create the surroundings we know.

In conclusion, These systems are on a balance to maintain human existence, meaning that if there is a disruption to one there is a disruption to all.

Read more about Earth

brainly.com/question/24878669

This image shows an overhead view of Atlanta’s buildings, structures, and surrounding areas and a heat map of the area. What is the most likely reason for the high temperature in the regions indicated in dark red? two maps of Atlanta, one showing an overhead view of Atlanta's buildings and structures and other showing the heat levels in the area Atlanta’s roads and buildings absorb more of the Sun’s radiation, causing higher temperatures than in surrounding regions. Atlanta’s trees and forests absorb more of the Sun’s radiation, causing higher temperatures than in surrounding regions. The rural areas around Atlanta absorb more heat than the urban areas, causing an overall increase in the city’s temperatures.

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The answer is A..................

Answer:

answer is a

Explanation:

just do it

What is a prediction

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An educated guess about something. (What might happen in the future)
a prediction is like a educated answer

give 2 examples of events that show that the speep of sound is very much slower than the speed of light

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Answer:

- You see lightning before you hear thunder.

- You see a rock fall before you hear its sound.

Explanation:

Brainliest???
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