A student observes a chemical reaction.

Aluminum (Al) + Oxygen (O) yields Aluminum Oxide (Al2O3)

She writes an equation that correctly displays the law of conservation of mass.

Select the balanced equation below that she wrote about this chemical reaction.

Group of answer choices

4Al + 3O2 --> 2Al2O3

4Al + 2O2 --> 3Al2O3

2Al + 3O3 --> 2Al2O3

Al + O2 --> Al2O3

Answer: The human circulatory system can be arranged from the highest to the lowest degree of internal organization as follows: Heart, Blood Vessels, Arteries, Veins, and Capillaries.

Explanation: The human circulatory system can be arranged from the highest to the lowest degree of internal organization as follows:

Heart: The heart is a vital organ responsible for pumping oxygenated blood to the body and deoxygenated blood to the lungs. It consists of chambers (atria and ventricles) and valves that regulate blood flow.

Blood Vessels: Blood vessels form a network of tubes that transport blood throughout the body. They can be classified into three types: arteries, veins, and capillaries.

Arteries: Arteries are thick-walled blood vessels that carry oxygenated blood away from the heart to various parts of the body.

Veins: Veins are blood vessels that transport deoxygenated blood from the body back to the heart. They have thinner walls compared to arteries and contain valves to prevent backflow.

Capillaries: Capillaries are tiny, thin-walled blood vessels that connect arteries and veins. They facilitate the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues.

Please note that this arrangement is based on the internal organization of the circulatory system, with consideration given to the hierarchical structure and function of each component.

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Answer:

Cell, tissue, organ and organ system

Explanation:

The correct order from the lowest to the highest degree of internal organization is the following Cell, tissue, organ, and organ system then at last whole body. It is because the cells are produced in order to form the tissues in the body and in order for an organ to be produced tissues are essential and are formed and in order for a system.

Answer:

An analogy to these waves can be shown in waves of a crowd. The standard wave we see at the baseball game could be considered a transverse wave because the people are moving perpendicular to the direction of the wave. If the people bump shoulders instead of standing up, this would be a longitudinal wave.

Explanation:

Answer:

m = 6 kg

m = 0.555556 kg

m = 0.282209 kg

Answer:Gravity is the force among the options listed that has not directly changed Earth's surface.

Explanation:

Gravity is a fundamental force that acts on all objects with mass, including the Earth itself, but it does not cause changes or modifications to the Earth's surface features. Instead, gravity influences the movement of materials and the shape of the Earth's surface by exerting a pulling force on objects. On the other hand, folding, erosion, and weathering are all processes that directly contribute to shaping

Answer:

I would recomend stuff like in one of Mark Rober's videos about a $1.00 microscope and centrifuge.

Explanation:

Harvard is working on cheap ways to allow third-world countries to have these types of machines without the need for electricity.

Answer:

i think it is D

Explanation:

Answer : This is an example of Kenitic and potential energy

Explanation:

kenitic: the act of moving or motion

potential: not. moving YET

he was not moving when he was on the plane and had potential energy cause he wasn't getting pulled down and kenitic energy was when he was getting pulled down from force of gravity when he was getting pulled to the ground when he was skydiving

Answer:

39,200J

Explanation:

just took the test

The meteor's potential energy if it has a mass of 10kg at an altitude of 400 m will be 39200 J

Potential Energy that depend upon the relative position of various parts of system . It is an energy possessed by an object by virtue of its position or configuration.

mass(m)  = 10kg

g (acceleration due to gravity) = 9.8m/s^2

altitude(height (h)) = 400m

Meteor's Potential energy = m * g * h

                                           = 10 * 9.8 * 400 = 39200 J

correct option will be a) 39200 J

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Electricity and magnetism are essentially two aspects of the same thing, because a changing electric field creates a magnetic field, and a changing magnetic field creates an electric field

Explanation:

(Can I please have Brainiest? :)

Answer:

A. The volume of the object

Explanation:

First of all, it can only PROBABLY be A or D

But why is it only A?

It's VOLUME here and not MASS here because:

is your answer!!!!

Answer's C

Explanation: The matter that surrounding this whole planet or time and frequencies the motion and forces that people can't determine unless made a hypothesis

Answer: This is the orbit (of the moon around Earth).

An orbit is a circular/oval path that planets, moons, comets, etc follow with a "subject" in the middle. In this case, the circle is the orbit of the moon around Earth.

The circle around the earth represents the orbit.

It is considered to be the regular, repeating path where one object should be in space that takes around the another one. The object in the orbit known as the satellite. It could be in natural way such as earth or moon. Also, it is the circular oval path where the planets, moons could follow the subject.

Therefore, The circle around the earth represents the orbit.

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Answer:

stays constant

Explanation

I kinda didn’t understand the question

A pendulum is a simple example of energy transfer. Beginning at position A, the pendulum fob is not moving. It has some energy because of its height (h) – called gravitational potential energy. When it is allowed to swing, that energy is gradually converted to energy of motion – kinetic energy.

A box camera is a simple type of camera, the most common form being a cardboard or plastic box with a lens in one end and film at the other. They were sold in large numbers during the late 19th and early 20th centuries. The lenses are often single element designs meniscus fixed focus lens, or in better quality box cameras a doublet lens with minimal (if any) possible adjustments to the aperture or shutter speeds. Because of the inability to adjust focus, the small lens aperture and the low sensitivity of the sensitive materials available, these cameras work best in brightly lit day-lit scenes when the subject is within the hyperfocal distance for the lens and of subjects that move little during the exposure. Eventually, box cameras with photographic flash, shutter and aperture adjustment were introduced, allowing indoor photos.

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3) Uses of pin hole camera?                                
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Answer:

a simple box-shaped hand camera, typically lacking an adjustment for shutter speed.

Answer:

the paper ball falls faster and the unfolded paper falls at a slower rate

Explanation:

this is because gravity is pulling both objects down to the ground and hence they are falling. Both objects have the same mass and weight but the resultant force of the paper ball is smaller than that of the unfolded paper. The unfolded paper has a larger surface area and so a larger force is acted upon it, meaning there is more air resistance. This shows that the paper ball falls faster than the unfolded paper.

The air resistance acting on the crumpled ball will be less and hence it will fall faster.

Air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. The larger the object, the more resistance it has as it falls.

Mathematically, we can write it as -

F = \(\frac{1}{2} C_{D}\) × ρv²A

Given are two identical pieces of paper such that one is crumpled up into a ball and the other one is left as flat sheet.

Now, as you throw both, the crumpled up ball and the flat sheet, the crumpled up ball will fall faster. The main reason behind this is that the total surface area of the crumpled ball in contact with the air is less than compared to that of the flat sheet. Air resistance on the crumpled ball with surface are in contact [say A(c)] can be written as -

F[1] =  \(\frac{1}{2} C_{D}\) × ρv²A(c)

And that on the flat sheet with area of contact with the air [say A(f)] can be written as -

F[2] =   \(\frac{1}{2} C_{D}\) × ρv²A(f)

Now as A(f) > A(c), therefore F[2] > F[1]

Therefore, the air resistance acting on the crumpled ball will be less and hence it will fall faster.

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At the bottom of its swing, it has the lowest potential energy. Option D is correct.

Potential energy is the energy stored in an object due to its position relative to other objects.

Here,
At the top of its swing, a pendulum has zero potential energy. At the bottom of its swing, it has the lowest potential energy.

In the case of a pendulum, potential energy is stored in the pendulum due to its position relative to the Earth. The higher the pendulum is, the more potential energy it has, and the lower it is, the less potential energy it has.

At the bottom of its swing, the pendulum is at its lowest point, so it has the lowest amount of potential energy. Thus, the answer is D) Zero.

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Answer:

KE= 900 (I think)

Explanation:

KE=½mv²

KE= ½(2)(30)²

KE=½(60)²

KE=30²

KE=900

Hope this helps!

Answer:

Image result for what's newton's second law

Newton's second law is one of the most important in all of physics. For a body whose mass m is constant, it can be written in the form F = ma, where F (force) and a (acceleration) are both vector quantities. If a body has a net force acting on it, it is accelerated in accordance with the equation.

Answer: A.) Is the material malleable or ductile.

Explanation: It the material is malleable, then it wouldn’t be a metal due to it changing shape.

The question that will best help the student classify the material is, Option A. Is the material malleable or ductile

A malleable material is one in which a thin sheet can be easily formed by hammering. Gold is the most malleable metal. In contrast, ductility is the ability of a solid material to deform under tensile stress.

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In an analogy of a circuit with a resistance to an obstacle race, we can consider various elements of the race as representative of different components of the circuit.Obstacles, Track or Route, Participants, Start and Finish Line.

Obstacles: The obstacles in the race represent the resistors in a circuit. Just as resistors impede the flow of current in a circuit, obstacles in the race create hurdles that slow down the participants. The difficulty or magnitude of the obstacles can be equated to the resistance value of the resistors in a circuit.

Track or Route: The race track or route itself can be seen as the conductive path in a circuit. It provides a pathway for the participants to move and complete the race. Similarly, the conductive path in a circuit allows the flow of current from the power source to the load.

Participants: The people participating in the race represent the flow of electrons in a circuit. Just as the participants move through the obstacles in the race, electrons move through the resistors in a circuit. The rate at which participants complete the race can be compared to the current flowing through the circuit.

Start and Finish Line: The start and finish line of the race correspond to the terminals of a circuit. The start line represents the positive terminal, where the participants begin their journey, and the finish line represents the negative terminal, where the race concludes.

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Answer: As an analogy of a circuit with resistance, the obstacles in an obstacle race represent the resistance in a circuit. The parts of the circuit that the obstacles represent are the resistors. The people in the obstacle race represent the current in a circuit. The current is the flow of charged particles (such as electrons) in a circuit. In an obstacle race, the people are moving through the obstacles, just as the charged particles are moving through the resistors in a circuit. The obstacles slow down the people, just as the resistors slow down the flow of charged particles in a circuit.

Explanation:

Answer: Explanation:

Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.

Answer:

near the 11'th mark I believe. I can't be sure until I see the options It'll be close to the 2n weight.

Explanation:

hope this helps I Can't answer so I don't want a thanks.

Answer:

i think its equal to

Explanation:

Answer:

D

Explanation:

The fossil record shows that the mammals gradually evolved so that their toes became one large hoof so this variation must have been more useful for survival than many toes. The correct option is 1.

Paleontologists, archaeologists, and geologists use the fossil record to place important events and species in the correct geologic era.

It is based on the Law of Superposition, which states that the bottom layers in undisturbed rock sequences are older than the top layers.

The neck and toes of early horse ancestors evolved in such a way that the neck and tail became longer and one of the toes disappeared over time. The fossil record demonstrates this, as Echippus had a short neck, a short tail, and four-toed feet.

The fossil record shows that mammals gradually evolved their toes into one large hoof, implying that this variation was more useful for survival than many toes.

Thus, the correct option is 1.

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Your question seems incomplete, the probable complete question is:

Echippus is an early ancestor to modern horses that lived 40 million years ago. The organism had a short neck and tail and also feet with four toes. After ten million years, the tail and neck became longer and one of the toes disappeared as seen in the Mesohippus. Evolution of these organisms continued 20 million years up to the present day with the organisms having longer necks and one solid hoof.

Which explanation can best be supported by the horse fossil record?

answer choices

Answer:

C. Beats

Explanation:

When waves are interfering with each other, the sound is louder in some places and softer in others. As a result, we hear pulses or beats in the sound.

Answer:

beats

Explanation:

got it right

Answer:

Please provide an image to help clarify

Explanation:

thanks :)

Answer:

10. dependent as a change has occurred which has affected something else which is measurable.

11. dependent as a change is made to the environment this is why some species cannot live there as they have adapted to the climate.

12. Dependent due to change occurring it has resulted in the population decreasing which is measurable.

13. Dependent as the animal's and plants' survival is reliant on the environment.

14. Dependant as the plants require sunlight for photosynthies

Answer:

All are dependent

Explanation: