4. Which is an example of a chemical change?
A
Rust forming
C.
Candy bar melting
B.
Water boiling
D.
Pencil breaking

Answers

Answer 1

Answer:

A.

Explanation:

A. Rust forming

is a example of a chemical change

Hope this helped you!!

Answer 2

Answer:

RUST FORMING

Explanation:

because it takes the chemical h2o to form rust


Related Questions

how to determine density?

Answers

Answer:

The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

Explanation: HOPE IT HELPS AND PLS MARK BRAINLIEST

The principle that energy cannot be created or destroyed is known as what

Answers

Answer:

Conservation of energy

Explanation:

Fill the blacks: ice is ____but has___ hydrogen bonds than liquid water
A- more dense- less
B- none of the thiss
C- less dense- less
D- more dense - less
E- less dense - more

Answers

Answer:

e

Explanation:

i took the test

match each muscle of the arm with the correct label

Answers

Answer: 1 - Brachialis 2 - Brachioradialis 3- Pronator teres 4 - Palmaris Longus 5 - Extensor carpi radialis 6 - Extensor digitorum

Explanation:

The correct match of the muscles has been stated below and these are as follows:

1 - Brachialis, 2 - Brachioradialis, 3- Pronator teres, 4 - Palmaris Longus, 5 - Extensor carpi radialis, 6 - Extensor digitorum.

What is muscle?

Muscle is defined as the group of the tissue and contraction has been defined as an action potential travels along the nerves to the muscle. The beginning of the muscle contraction which has been occurs with the signal generated from the nervous system.There are generally two types of the muscle contraction and the situation occur when the muscle contracts and the change in the size takes place.

Isotonic concentric contraction h been known as the type of muscle contraction in which muscle has been shortening takes place. Isotonic eccentric contraction has been the type of the muscle contraction in which the muscle lengthening whilst it is under tension.

Therefore, 1 - Brachialis, 2 - Brachioradialis, 3- Pronator teres, 4 - Palmaris Longus, 5 - Extensor carpi radialis, 6 - Extensor digitorum.

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A cell from which organism would most likely be smallest?

Answers

Answer:

A

Explanation:

a bacteria would be the smallest thing in that list resulting in the smallest cell

pls mark brainliest

Fill the container to the top with the particles. Place your hand tightly over the top of the container and shake it. What state of matter does this represent? Explain.

Answers

Answer:

It should be solid.

Explanation:

Solids have little to no movement in their particles. If you were to fill it to the top and shake, not much would move, therefore representing solids.

Particles are the unit that makes the matter. The states of matter based on particles can be solid, gas, or liquid. The matter in the experiment represents solid matter.

What are phases of matter?

The phases or states of matter are based on the composition and the distribution of the particles of the object. There are four known and observable states of matter namely solid, gas, plasma, and liquid.

The gas is the freest and most spaced particle with no fixed volume and shape. On the other hand, the particles of a liquid are a little closer than the gas but do have an indefinite shape.

The solid has particles closely packed with no space, which makes them have a definite shape and volume. When a container filled with particles is shaken, there is no movement as they are very closely packed, like solid.

Therefore, the container represents solid matter.

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Which of the following individuals may be required to undergo HIV testing? a) Employees of a small business with limited health insurance resources b) A technician at an HIV testing lab c) A convicted sex offender d) A nurse applying for a job at a hospital

Answers

Answer:

c) A convicted sex offender

Explanation:

HIV testing is mandatory in the U.S. in certain cases, including for: blood and organ donors, military applicants and active duty personnel, federal and state prison inmates under certain circumstances and newborns in some states.

cells possess defense systems, because molecules such as play a role in aging and disease in high concentrations. a.Antioxidant;Hydrogen peroxide. b.antioxidanr;catalase.
c.oxidant:potassium prrmanganate. d.oxidant;hydrogen peroxide. e.antioxidant;potassium permanganate​

Answers

Answer:

I would say C

Explanation:

Based on what I can understand it is asking about how cells age and disease. Something like that.

Oxidents result in aging and creating free radicals. Hydrogen peroxide forms in cells to break down old organelles.

what type of materials are expelled from cells during exocytosis

Answers

Answer:

During exocytosis cells expel a variety of materials including waste products, toxins and large molecules such as hormones, proteins and neurotransmitters into the extracellular environment.

Explanation:

Waste Products, Toxins, and large molecules like hormones, proteins and neurotransmitters

A block of aluminum occupies a volume of 20.0 mL and weighs 30.5 g. What is its density?

Answers

Answer:

1.525 g/mL

Explanation:

Density is calculated by dividing mass and volume

30.5 g / 20.0 mL= 1.525 g/mL

A family paid ​$ 28,000 as a down payment for a home. If this represents 14​% of the price of the​ home, find the price of the home.

Answers

Answer:

175000.00

GBP

 

16

%

=

28000

so we can also say  

100

%

=

x

Then from here the rule says that you do  

100

×

28000

16

So if we do that we get a result of  

175000

That is the price of the home.

x

=

175000.00

GBP

Explanation:

So we must begin with a rule that is commonly used to work this out.

Hope this worked out <3

¿Qué puede suceder si un contaminante como herbicidas, desechos animales, desechos de fabricación y pesticidas ingresa al agua subterránea?

Answers

Answer:

La contaminación del agua subterránea puede resultar en una mala calidad del agua potable, pérdida de suministro de agua, sistemas de aguas superficiales degradados, altos costos de limpieza, altos costos de suministros alternativos de agua y / o posibles problemas de salud. Las consecuencias de las aguas subterráneas contaminadas o de las aguas superficiales degradadas suelen ser graves

Please help dont put down some answer please i will give you good review and lots of points.

Answers

Answer:

Planet Y

Explanation:

Planet Y has the smaller period because it takes less time to orbit the star. This is because it has less distance to travel compared to X.

the last time the average global temperature was below zero degrees celsius was in 1950

Answers

Answer:

Mean global temperatures then stabilized at roughly 14.0°C (57.2 °F) until the 1980s. The world has mainly grown hotter since 1980, at a rate of nearly 0.2 °C (0.36 °F) per decade.

Explanation:

Hope this helps.

Which of these microbes has the most complex cell wall?

Answers

Plant cells have what is perhaps the most complex outer coverings. Plant cell walls are made largely of cellulose which forms strong, highly rigid, almost indigestible coverings that protect the cell and gives it shape.

Drag the appropriate labels to their respective targets. Label processes on the right in PURPLE, and all other components on the left.

Answers

Starting from the top downward:

Group 1:

TranscriptionRNA processingTranslation

Group 2;

DNAPre-mRNAmRNARibosomePolypeptide

The entire setup represents what happens during gene expression. The process starts in the nucleus with genetic information in DNA being transcribed into mRNA.

The pre-mRNA undergoes some processing before being transported to the cytoplasm where it gets attached to the ribosome and utilized in the synthesis of polypeptides (also known as proteins) in a process known as translation.

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Predict the appearance of an igneous rock that formed as magma
cooled quickly and then more slowly.

Answers

Answer:

It would have smaller crystal sizes at first- closer to the surface

and larger crystals in the middle/core

Explanation:

smaller crystals are formed at faster cooling rates

larger crystals are formed at slower cooling rates

________ causes euphoria followed by agitation, and is the major opioid drug of abuse.

Answers

Heroin is an opioid drug composed of morphine, a natural alkaloid derived from extracts from the seeds of the opium poppy. It is for that reason that heroin is considered a semi-synthetic opioid.

HEROIN causes euphoria followed by agitation, and is the major opioid drug of abuse.

Heroin is a drug that causes addiction, a form of substance use disorder.

This drug (heroin) is capable of entering the brain quickly and producing immediate effects.

The feeling of euphoria caused by heroin is followed by a period of sedation because heroin (as well other opioids) sedates the brain.

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What’s everyone’s favorite tv show or movie?

Answers

I dont watch tv shows or movies

lol

This is the Bohr model for which element on the periodic table?

Answers

Answer:

The answer is Beryllium

carbon, it has 6 dots on the bohr model and it’s atomix number is 6

What are some functions of lipids?

Answers

Lipids are found in living organisms. it forms cell membrane which act as semipermeable membrane

it is formed by smooth endoplasmic reticulum

Answer:

Lipids

Explanation:

lipids function is an energy reserve, regulate hormones, transmit nerve impulses,and transport fat-soluble nutrients and they are energy-storage molecules and chemical messengers.

Hope this helps

Have a good rest of your day

5. Look at the highlighted portion of the graph. Which of the following is the best explanation for what is occurring within the population during this time period? A. birthrate > death rate B. birthrate < death rate C. birthrate = death rate

Answers

Answer:

A. birthrate > death rate

Explanation:

I had this question and this was the right answer

At what age will most adults experience decreased ROM

Answers

For instance, due to the normal aging process, muscle properties decline about 30–50% between the ages of 40 and 80 years old; this decline may result in reduced range of motion (ROM), reduced muscle strength, and diminished plantar tactile sensation leading to alteration in plantar loading responses3).

Answer:

between the ages of 40 and 80 years old

Explanation:

Uranium is an element that is often used in nuclear power plants. Uranium atoms are very large, and the substance can be dangerous if it is not carefully contained.

Answers

Answer:

What is the volume of a sphere with a radius of 24 units? A. 92167 units O B, 230477 unite 3 O c. 18A324 units D. 13,8247 units

Explanation:

Animals such as foxes and cats often prey on rabbits. Based on the growth curve of the rabbit population, what
might have happened if a group of predators moved into the rabbits habitat during the tenth generation and
began eating the rabbits?

Answers

Answer:

If this happened that would affect to amount of food the other predators got, eventually causing decreases in their species.

Explanation:

If a group of predators moved into the rabbit's habitat during the tenth generation and began eating the rabbits, it would definitely affect the amount of food and other resources that are available for other predators that directly or indirectly depend on the rabbit's population.

What is a Habitat?

A habitat may be defined as a type of natural environment for which a particular species is best adapted due to natural selection. In this natural environment, the basic demands of an organism are fulfilled like food, space, mating partner, etc.

When a group of predators starts eating the rabbits, the population of rabbits gradually decreases. Due to this, the other predators of the same species feel the scarcity of food and resources. As a result of this, their number or population also declines slowly or adapted to other species.

Therefore, it would definitely affect the amount of food and other resources that are available for other predators that directly or indirectly depend on the rabbit population.

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Which of the following is true about subatomic particles?
The mass of a neutron is equal to the mass of a proton


Neutrons have no charge and are the lightest subatomic particle


Electrons are negatively charged and are the heaviest subatomic particle


Protons are positively charged and the lightest subatomic particle

Answers

Answer:

Neutrons have no charge and are the lightest subatomic particle

Explanation:

Nucleus of an atom contains three subatomic particles. These are protons, neutrons and electrons.

Mass of a proton is  [tex]1.67[/tex]×[tex]10^{-27}[/tex]kg.

Mass of a neutron is  [tex]1.67[/tex]×[tex]10^{-27}[/tex]kg.

Mass of an electron is [tex]9.1[/tex]×[tex]10^{-31}[/tex] kg.

Also, protons are positively charged, neutrons have no charge and electrons are negatively charged.

Therefore, we can conclude that the mass of a neutron nearly equals the mass of a proton.

The Earth is primarily composed of:


water


rock


gas

Answers

Resposta:  resposta é a

water

Explanation:

The earth is primarily composed of rock. Therefore, option B is correct.

What is the structure of the earth?

The crust, mantle, outer core, and inner core are the four principal parts that make up the earth's structure. Each layer has a distinct chemical makeup, physical state, and potential to affect life on the surface of the Earth.

the outermost layer crust is composed primarily of granite and basalt rock. Oceanic and continental crusts are two different types. The majority of the oceanic crust is made of basalt and is denser and thinner. Granite makes up the majority of the less dense, thicker continental crust. The mantle is made of solid rock that is hot, thick, and rich in iron and magnesium. The liquid and solid portions of the core make up the earth's center.

The earth is primarily composed of rock. Therefore, option B is correct.

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What mommy yes are used to build the sugar in photosynthesis. Multiple choice PLEASE AND THANKYOU

carbon dioxide
none of these
oxygen
water

Answers

6 moles of carbon dioxide and water are used to synthesize 1 mole of glucose, in photosynthesis

6 CO2 + 6 H2O + Solar energy ----> C6H12O6 + 6 O2

se presenta cuando un dividuo se alimenta de una parte del cuerpo de otro individuo conocido como huésped u hospedero Cuál es el organismo ​

Answers

Answer:

El parasitismo ocurre cuando un individuo, el parásito, se beneficia de otro individuo, el anfitrión, mientras daña al anfitrión en el proceso. Los parásitos se alimentan de tejidos o fluidos del huésped y se pueden encontrar dentro (endoparásitos) o fuera (ectoparásitos) del cuerpo del huésped (Holomuzki et al. 2010).

YA'LL ARE SMART ! PLEASE HELP!

Answers

Answer:

hello

Explanation:

it's 18m/s

180/10

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