PHYSICS MIDDLE SCHOOL

Which determines the state of matter for any material? A.
the size of the atoms


B.
the hardness of the material


C.
the behavior of the molecules


D.
the weight of the material

Answers

Answer 1
Answer: C. The behavior of the molecules.
Answer 2
Answer:

Answer:

c

Explanation:

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What are two components that make up force?

Answers

the answer is mass and acceleration
gravity and energy hope this helps bro

Which parts of the graph would increase if all of earth's polar ice melts? Which part would decrease?

Answers

Answer:

the answer to the question is the part that is reflected by clouds and atmosphere 26%

Final answer:

If all of Earth's polar ice melts, the global sea level and average global temperature would increase, while the area covered by ice in the polar regions would decrease.

Explanation:

If all of Earth's polar ice melts, several parts of the graph would increase. One part that would increase is the global sea level. As the ice melts, the water would contribute to higher sea levels. Another part that would increase is the average global temperature. The melting ice would release more greenhouse gases, which would further contribute to global warming. Hurricanes and extreme weather events would also increase in frequency and intensity.

On the other hand, the part of the graph that would decrease is the area covered by ice in the polar regions. With the melting of the polar ice, the ice extent would significantly shrink, leading to decreased ice coverage over the Arctic and Antarctic regions.

Learn more about Effects of melting polar ice here:

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Can you explain that gravity pulls us to the Earth & can you calculate weight from masses on both on Earth and other planets?

Answers

I don't actually understand what your question is, but I'll dance around the subject
for a while, and hope that you get something out of it.

-- The effect of gravity is:  There's a pair of forces, in both directions, between
every two masses.

-- The strength of the force depends on the product of the masses, so it doesn't matter whether there's a big one and a small one, or whether they're nearly equal. 
It's the product that counts.  Bigger product ==> stronger force, in direct proportion.

-- The strength of the forces also depends on the distance between the objects' centers.  More distance => weaker force.  Actually, (more distance)² ==> weaker force.

-- The forces are equal in both directions.  Your weight on Earth is exactly equal to
the Earth's weight on you.  You can prove that.  Turn your bathroom scale face down
and stand on it.  Now it's measuring the force that attracts the Earth toward you. 
If you put a little mirror down under the numbers, you'll see that it's the same as
the force that attracts you toward the Earth when the scale is right-side-up.

-- When you (or a ball) are up on the roof and step off, the force of gravity that pulls
you (or the ball) toward the Earth causes you (or the ball) to accelerate (fall) toward the Earth. 
Also, the force that attracts the Earth toward you (or the ball) causes the Earth to accelerate (fall) toward you (or the ball).
The forces are equal.  But since the Earth has more mass than you have, you accelerate toward the Earth faster than the Earth accelerates toward you.

--  This works exactly the same for every pair of masses in the universe.  Gravity
is everywhere.  You can't turn it off, and you can't shield anything from it.

-- Sometimes you'll hear about some mysterious way to "defy gravity".  It's not possible to 'defy' gravity, but since we know that it's there, we can work with it.
If we want to move something in the opposite direction from where gravity is pulling it, all we need to do is provide a force in that direction that's stronger than the force of gravity.
I know that sounds complicated, so here are a few examples of how we do it:
-- use arm-muscle force to pick a book UP off the table
-- use leg-muscle force to move your whole body UP the stairs
-- use buoyant force to LIFT a helium balloon or a hot-air balloon 
-- use the force of air resistance to LIFT an airplane.

-- The weight of 1 kilogram of mass on or near the Earth is 9.8 newtons.  (That's
about 2.205 pounds).  The same kilogram of mass has different weights on other planets. Wherever it is, we only know one of the masses ... the kilogram.  In order
to figure out what it weighs there, we need to know the mass of the planet, and
the distance between the kilogram and the center of the planet.

I hope I told you something that you were actually looking for.

A watershed exists in a mountainous area. In which type of water body will the water flow the fastest? aquifer, tributary, lake, or a river

Answers

That would be Letter B. Lake

Answer:

the the waterside exits in a mountain in in our river

Explanation:

the water comes from the Icebergsand foam water bodies and make a river and then it forms lakes and tributaries

A stuntman jumps from the roof of a building to the safety net below. How far has the stuntman fallen after 2.3 seconds? A. 25.9 m B. 21.2 m C. 9.8 m D. 11.3 m

Answers

Answer:

answer should be 25.9

Explanation:

Answer:

25.9 m

Explanation:

How high has a 45 g golf ball been driven if it has a potential energy of 2.06 J?

Answers

Here, U = mgh

We have: m = 45 g = 0.045 Kg
U = 2.06 J, g = 9.8 m/s², h = ?

Substitute the values in the formula:
2.06 = 0.045 × 9.8 × h
2.06 = 0.441 × h
h = 2.06 / 0.441
h = 4.67 m

In short, your final answer would be 4.67 meters

Hope this helps!
PE=mgh
2.06 J = 2.06 kg·m²/s² = (0.045 kg)·(9.8 m/s²)·h
where h is the height the ball has reached
Solve for h:
h = 2.06/(0.045·9.8) = 4.67 to the nearest hundredth
h = 4.67 m
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