PHYSICS MIDDLE SCHOOL

How long does it take to change a flat plain into mountains?

Answers

Answer 1
Answer: It would take millions of years to form a mountain as plates move very slowly and to form it first one plate should climb upon another. After this very slowly this hill will convert into a mountain.

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Humid air is a better electrical conductor than dry air. Explain why you are most likely to receive a shock after walking across a carpet when the air is dry than when the air is humid.

Answers

The carpet is more likely to accumulate excess electric charge (static electricity) over time when there is no good way for it discharge. The dry air, as was said, insulates the carpet and makes it prone to such accumulation. This is less the case with humid air that allows the carpet to continuously discharge a portion of its electric charge over time and thus spares us--the walkers--a minor shock.

Final answer:

Dry air is a better electrical conductor than humid air, which is why you are more likely to receive a shock after walking across a carpet when the air is dry compared to when the air is humid.

Explanation:

The reason you are more likely to receive a shock after walking across a carpet when the air is dry than when the air is humid is because dry air is a better electrical conductor than humid air. When the air is dry, it has a lower field strength, meaning that it takes a smaller voltage to create a spark. On the other hand, humid air breaks down at a lower field strength, so it takes a larger voltage to create a spark. This is why you are more likely to get a shock on a dry day.

Learn more about Electrical Conduction here:

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Explain why a golf ball is heavier than a table-tennis ball even though the balls are the same size?

Answers

it has to do with the material the ball was made with not the size. Also a golf ball has more mass the more mass it has the more dense the ball is going to be.
A golf ball has more mass

Do heavier objects fall slower than lighter things?

Answers

no, hevier things only seem to go faster because of air resistance

if you dropped two identical bottles in a vacum, with one empty and the other full, then both bottles would hit the ground at the same time
No. The gravitational pull on all objects -9.8m/s/s.
Because there is no mass variable in order to find the rate at which objects fall, this means that mass does not have an affect on the rate at which objects fall.
You also must consider wind resistance but that's a more in depth concept.

You can watch a video on youtube called "Hammer vs. Feather - Physics on moon". It shows how on the moon (Where there is no wind resistance) how a hammer and a feather fall at the same rate

When polarizing an object, what happens to the charges in the object?A. They swirl about like bees in a hive.
B. They separate, with positive charges on one side and negative
charges on the other.
C. The protons drain off, leaving the object negatively charged.
D. They repel each other and spread out all around the outer surface.

Answers

Answer:

B. They separate, with positive charges on one side and negative

charges on the other.

Explanation:

Why do we get tired?

Answers

We get tired because our bodies are always working and using energy. And doing all that work makes our bodies need rest and sleep.

How is electron movement related to the bonding in sodium chloride? A) The atomic orbitals overlap and share electrons causing an ionic bond to form. B) Electrostatic sharing of electrons between atoms allows covalent bond formation. C) Electrons exchange creating ions to form an ionic bond by electrostatic attraction. D) Orbital overlap occurs between the atoms to exchange electrons to form the covalent bond.

Answers

Answer: Option (C) is the correct answer.

Explanation:

Sodium has atomic number 11 and its electronic distribution is 2, 8, 1. Whereas chlorine has atomic number 17 and its electronic configuration is 2, 8, 7.

Therefore, we can see that sodium has one extra electron and chlorine has deficiency of one electron.

So, in order to complete their octet sodium will give its one valence electron to the chlorine atom. Hence, there is exchange of electrons and thus it will result in the formation of ionic bond.

Thus, we can conclude that in sodium chloride electron movement is related to the bonding as electrons exchange creating ions to form an ionic bond by electrostatic attraction.

Answer:

Its C

Explanation: just had it on usatestprep
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