Explain why the top of the loop cannot be the same height as (or higher than) the top of the first hill. Assume the roller coaster and its surroundings are close to a closed system. Use what you know about energy transformations and the effects of friction within a closed system to write your answer.

Passage
Examine this diagram of a roller-coaster track. The very top of the first hill (point B) is higher than the very top of the loop (point D). After the cars reach point B, this roller coaster needs no additional energy to complete its trip.

Answer:

Chlorine and Fluorine

Explanation:

When you look at our descriptions of the elements fluorine and chlorine, you will see that they both have seven electrons in their outer shell. That seven-electron trait applies to all of the halogens. They are all just one electron shy of having full shells.

Answer:

F And AR i think

Explanation:

Answer:

1st question: C. Energy

2nd question: C. Troughs and D. Crests        (does it allow two?)

3rd question: B. Rarefaction

Explanation:

Hope this helps! =)

Answer:  For the volume of a regular shaped object, multiply the width and the length and then multiply the result by the height. As for the volume of an irregular shaped object, first break the object down into more regular shaped objects. Then calculate the volumes of the small regular shaped objects, and add all the volumes to get your answer.

Answer: Density, pressure, and temperature all increase as you go deeper into the Earth.

Explanation: Explanation: As you go deeper in depth, pressure increases. Density = mass/volume. The layers beneath us due to pressure get packed to the point of being very dense.

Answer:

it is D

Explanation:

bc it has an chorloplast and the musle slowly moves so its looks as its not

Answer:

Prob. D

Explanation:

I am also a Visual Learner.

Answer:

I'm pretty sure the answer you selected is correct.

Explanation:

Answer:

I think it is, All four ways transfer energy.

Explanation:

Hope this helps

Answer:

Many races are lost at the starting line, the block gives you a solid base from which to push.

Explanation:

Answer:

/

Explanation:

Answer:

D. Muscular

Explanation:

i like ya cut g

Plz give me brainlist

:)

Answer:

Examples of Synthetic Materials – Examples of synthetic materials include synthetic fibers, ceramics, polymers, artificial foods and medicines, and composites. Synthetic fibers are flexible. They can be used to make clothing and other objects. Some examples of synthetic fibers are rayon, polyester, and nylon.

Explanation:

Close enough eh :l

Answer:

One of the steps is to mold.

Explanation:

I hope this help's

Answer:

As time passed The telephone poles cleaned and moved a little I’m guessing

Explanation:

There don't appear to be any dial tone problems on telephone caused by broken wires, connectors, wall jacks, or other network-interfering hardware.

When your telephone wire's phone isn't working, whether you don't hear a dial tone, can't dial out, or hear too much static, it may be quite aggravating.

We're here to assist you! This wiki How article will show you how to troubleshoot all kinds of landline issues that develop in your house or workplace, including damaged jacks, defective wiring, and interference issues.

Your cordless phone's batteries need to be replaced. Customers of Pure Broadband who solely use our internet service may hear a dial tone, but they do not actually have a working telephone.

Therefore, The telephone poles became cleaner and slightly more mobile as time went on.

Learn more about telephone here:

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Answer: It is D.

Explanation:

The compass needle pointed in the direction of the current's magnetic field.

Answer:

B and D ( not absolutety sure though)

Answer:

B) prioritizer

Explanation:

i thing

Answer:

Scientific equipment we’ve installed on the Moon. and luner foot prints

Answer:

Force is defined as the rate of change of momentum (momentum is mass multiplied by velocity) with respect to time. Work is the product of displacement and the component of force in the direction of displacement. If work is done, then the kinetic energy of an object changes.

Explanation:

That is the difference between force and work

Answer:

0.4 hour or 24 minutes

Explanation:

Speed =displacement /time

25miles/hour=10/time

10/25=time

0.4hour=time

Answer:

24 minutes

Explanation:

• If the speed limit is 25miles/hour, it takes 2.4 minutes to travel 1 mile.

60mins/25miles

= 2.4 minutes

• Therefore to travel 10 miles;

2.4 minutes × 10

= 24 minutes

Answer:

D

Explanation:

D is true.

And after it's been happening for a while, the system arrives at A .

Answer:

Stone

Air

Water

All Elements Of the Periodic Table

Plants

The Sun

Grime

Sand

Climate

Food That Grows On Plants

Explanation:

Answer: You may want to mention the equal but opposite force of shooting a gun. (The recoil force vs. the bullet).  Also, if you bounce a ball really hard, it will exert force that makes it bounce high up, and this is the same if you were to bounce the ball with little force. Also, a judge's gavel creates a sound (sound waves would be the opposite force here) after it is hit on the podium. Lastly, if you blow up a balloon without tying it, then let it go, the trapped moving particles will make the balloon fly and flail until there is no more pent-up energy inside the balloon.

Explanation: Hope this helps a little! I added an extra example just in case!

Answer:

Answer: Options A, B, and E

Explanation:

The gravitational pull on an object by another, is nothing but the force that it exerts due to its gravity. Earth has gravity, so it pulls down everything that tends to move up. Similarly, Hox and Blox have gravitational pulls on each other, due to their gravitational forces.

Where,

F = force exerted on object

G – Gravitational constant

– Mass of two objects

r – Distance between two objects

This gravitational pull varies in phase with the mass of two bodies in relation, and inversely proportionate to the distance square. Hence, the scientist could do less the distance between the bodies, or else, spend to increase the size of one of them or both the bodies.

Explanation:

Answer:

I belive the answer is d because it describes PHYSICAL weathering the other options are events or they describe chemical weathering

Answer:

superconductor  conductor  semiconductor  insulator

Explanation:

Edge

The list's type of materials from most conductive to the least conductive will be superconductor,conductor,semiconductor and insulator.

Semiconductors are materials with conductivity intermediate between conductors and nonconductors or insulators. Semiconductors may be either compound like gallium arsenide.

The ideas, characteristics, and mathematical techniques that control semiconductors are explained in physics.

Silicon is employed in the manufacturing of electrical circuits, whereas gallium arsenide is used in solar cells, laser diodes, and other applications.

The types of materials from most conductive to least conductive will be superconductor,conductor,semiconductor and insulator.

Hence, option B is correct.

To learn more about the semiconductors, refer to the link;

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Answer:Explore acceleration, speed, momentum, and energy

Explanation: