The melting of wax is a physical change , yet the burning of wax is a chemical change . What is the essential difference between the physical change and chemical change of wax in a burning candle

Answers

Answer 1

Answer:

A physical change does not change the identity of an element but a chemical change does.

Explanation:


Related Questions

Most enzymes are proteins. Many cells make and use an enzyme called catalase to facilitate the decomposition of hydrogen peroxide (H2O2). The products of the decomposition are hydrogen (H2) and oxygen (O2). Stephanie is investigating the structure and function of catalase, and she is comparing catalase to other proteins. What can Stephanie predict will distinguish the structure of catalase from the structures of the other proteins she is studying? A. many regions made entirely of hydrogen and oxygen B. the chemical properties of the peptide bonds C. the types of amino acids it contains D. the sequence of amino acids it contains

Answers

Answer:

The correct answer is - B. the chemical properties of the peptide bonds.

Explanation:

The difference between the structures of catalase from other proteins depends on the chemical properties of the peptide bonds present in between the amino acids which decide the pH and temperature by their disruption. These bonds present between two alpha-amino acids when carboxyl of one amino acid interacts with the amino group of the other to form an amide-type covalent bond.

please help, anything will do! thank you! I have provided eveyrhtign and did the lab (procedures).

Answers

The whale and the bat are the most different because of the size of the hands or fins.

And the human and the cat are the most similar because they are almost identical to each other from the bottom up


You can conclude that the one that were alike were related in some type of way

What is the correct order of a food chain containing the following organisms: quail (bird), desert shrub, coyote, snake?

Answers

Answer:

desert shrub - quail - snake - coyote

Explanation:

the quail bird eats the desert shrub, the snake eats the quail, the coyote (a-pex predator in this chain) eats the snake.

A fungus cell is a prokaryotic cell. True or false?

Answers

A fungus cell is a eukaryotes so it’s false

The function of the testes and ovaries in reproduction

Answers

Testes            

-Male reproductive gland that produces sperm and male hormones

Ovaries          

-Female reproductive gland that produces eggs and female hormones

Hope this helped!

How do Hadley cells affect savannas climate

Answers

They do because they do

Placing the egg in which fluid would give a different result?

Answers

Answer:

Orange juice and vinegar both contain acids which react with the calcium carbonate in the eggs to produce carbon dioxide gas. This is why the eggs fizz in those liquids. Over time, this reaction has the effect of destroying the egg shells and leaving behind the inside of the egg.

Explanation:

how do the weight of objects on earth compare the weight of the objects on the moon why do you think this is

Answers

Answer:

Being that the moon has a gravitational force of 1.622m/s 2, we multiply the object's mass by this quantity to calculate an object's weight on the moon. So an object or person on the moon would weigh 16.5% its weight on earth. Therefore, a person would be much lighter on the moon. Conversely, a person is 83.5% heavier on earth than on the moon.

Explanation:

hope this helps you out love!! <3

Answer:

weight of objects on EARTH> weight of objects on MOON

Explanation:

weight= mass * gravity

assuming both objects have the same mass, the environment with greater gravity will result in a greater weight

gravity of earth > gravity on the moon

so

weight of objects on EARTH> weight of objects on MOON

Which career combines DNA technology and forensics? pharmaceuticals paternity testing environmental studies genetics

Answers

Answer:

B. Paternity

Explanation:

Edge 2020

The career that combines DNA technology and forensics is paternity testing. The correct option is B.

What is paternity testing?

DNA testing examines an individual's DNA banding patterns to determine the identity or mutations of a specific gene.

Paternity testing is a type of DNA testing that is used to determine paternity and the true nature of a relationship.

The lab compares tissue samples from the mother, the child, and the man to determine what unique characteristics known as genetic markers the child shares with the mother and the man who may be the father.

The chromosomes that determine the gender of the baby (X and Y chromosomes). The mother's egg typically contributes an X chromosome, while the father's sperm contributes either an X or a Y chromosome.

These tests are extremely accurate in determining whether a man is the biological father of a child.

Thus, the correct option is B.

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A red blood cell would burst if placed in a(n) ___ solution with no cell wall.

A. Isotonic

B. Hypertonic

C. Hypotonic

Please help! 10 points

Answers

Answer:B

Explanation:

Can someone help me with this question pls (8th grade science)

Answers

Answer:

C

Explanation:

The exerpt states that movements in the Earth's crust (unbalance) causes Earthquakes. When it's balanced, there is no plate movement.

Answer: c

Explanation: if there is no plate movement that means that there is a balanced force there is nothing that is disrupting it. but if there's an earthquake in that means that there are unbalanced forces in that they cause an earthquake. a force is balanced if the two individual forces are of equal magnitude and of the opposite direction. And an object is said to be acted upon by an unbalanced force when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction.

List the 5 clues that Wegener used to prove continental drift and that Pangaea once existed?

Answers

Answer:

1. same plants on different continents

2. similar animals present on different continents

3. he put together the continents on the map and saw they fit together

4. geological features that spread across continents

5. finding rocks and materials in many different places that couldn't of formed due to climate

what does the process of breaking and reforming bonds allow cells to make?

Answers

Synthesis releases energy because the molecules bond to form a stable configuration and therefore give up energy. The bonded molecules have a lower energy level than free molecules and are held in the new bond.

The process of breaking bonds between molecules and the making or reforming of bonds encompasses chemical processes which allows the creation or formation of new molecules.

When bond is broken such that a certain element splits from a compound, new molecule is formed. Endothermic processes required energy to break bonds between atoms.

Bond making on the other hand are exothermic processes which involves merging of bond accompanied by the release of energy to form new molecules.

Therefore, bith Endothermic and exothermic processes allows cells to make new molecules.

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what position will kamala harris hold on sunday 20,2021

Answers

Answer:

Vice President?

Explanation:

Answer:

vice president she the first black woman,indian and woman to be vice president her innaguration was yesterday

Explanation:

Which of the following statements is true regarding electromagnetism?

All wires are electromagnetic.

Only wires carrying current are electromagnetic.

Only iron wires are electromagnetic.

Only copper wires are electromagnetic.

Answers

Answer:

Only iron wires are electromagnetic.

Only wires carrying current are electromagnetic.

Alexis is using models of the cell membrane to compare the types of cellular transport. One

model shows a molecule entering through a protein pump. Which ope of cell transport is
being modeled?
A
diffusion because protein pumps are needed to move substances from a higher
concentration to a lower concentration
8
endocytosis, because protein pumps transport substances that are too large to
pass through the cell membrane
active transport, because protein pumps are needed to move substances against a
concentration difference
D
osmosis, because protein pumps allow water to cross the cell membrane

Answers

Answer:

C. active transport, because protein pumps are needed to move substances against a concentration difference

Explanation:

There are two major types of transport in living cells namely: passive transport and active transport. The passive transport moves molecules down a concentration gradient and hence, do not need energy (ATP) to occur. However, on the other hand, ACTIVE TRANSPORT moves substances against their concentration gradient, thus, require energy input.

Active transport makes use of PROTEIN PUMPS to achieve this process. Hence, in this case where Alexis is using models of the cell membrane to compare the types of cellular transport. The model that shows a molecule entering through a protein pump is modelling ACTIVE TRANSPORT.

Help me I need help pls
It’s question 3

Answers

D. Gene

A gene is a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

What substances are combined with sunlight in the process of photosynthesis?
A. carbon dioxide and water
B. water and simple sugar
C. carbon dioxide and oxygen
D. oxygen and simple sugar

Answers

Answer:

A. carbon dioxide and water

A. Amber and evolution

B. Cast and imprint

C. Theory, cast

D. Carbon dating and radioactive isotopes

Answers

Answer:

A. Amber and evolution

Why does calcium concentration matter to a cell?

Answers

Answer:

HOPE IT MAY HELP YOU

Explanation:

Calcium-based signaling is used in many cellular and neuronal processes to initiate rapid responses to extracellular signals. Cells therefore maintain tight control over intracellular Ca2+ levels, using a variety of channels and pumps.

Answer:

to answer your question it is

Explanation:

Calcium-based signaling is used in many cellular and neuronal processes to initiate rapid responses to extracellular signals. Cells therefore maintain tight control over intracellular Ca2+ levels, using a variety of channels and pumps. ... neuron

During a murder investigation, the medical examiner tests the contents of the
victim's stomach to try to identify their last meal and establish a connection to a
suspect. The contents tested using Lugol's iodine turned a dark purple color
which indicates the presence of starch. This test indicates which of these
macromolecules was present in the victim's last meal? *

A. Proteins
B. Carbohydrates
C. Lipids
D. Nucleic Acid

Answers

D bucolic acid is history and rain stomach

If a father has type A blood and the mother has Type AB blood, they would NOT have a child with which of the following blood types?

AB

A

B

O

Answers

Answer:

If a father has type A blood and the mother has type AB blood, they cannot have a child with blood type O, although depending on the father's genotype, they may not have children with a B blood type either.

Explanation:

Blood type is determined by the presence or absence of surface antigens A and B, which is genetically determined and establishes the pattern of inheritance.

Alleles that define the presence of antigens A and B are co-dominant, while the absence of antigens - as in blood type O - is a recessive trait.

Type A contains antigen A and its genotype can be A|A or A|O. Type B contains the B antigen, whose genotype can be B|B or B|O. Blood type AB contains both antigens and a single genotypic expression A|B Type O blood lacks surface antigens, with genotype O|O.

The father with blood type A can have two genotypes, A|A or A|O, which raises 2 possible scenarios:

1. Father A|O with mother A|B

Alleles       A         O

A              A|A      A|O

B              A|B      B|O

In this case there is no chance of having a child with blood type O, 50% chance of having children with blood type A, 25% B and 25% AB.

2. Father A|A with mother A|B

Alleles        A        A

A               A|A     A|A

B               A|B     A|B

50% chance of having a child with blood type A and 50% with blood type AB. In this case there is no chance of having children with blood type O or B.

In plants, yellow pea color (Y) is dominant over green pea color (y). Two heterozygous plants (Yy) are crossed. Which of the following results supports Mendel’s Laws

1.All of the yellow offspring are heterozygous for color.

2.all of the offspring have genotype Yy.

3.All of the offspring are yellow.

4. The offspring could be yellow or green.

Answers

Answer: .All of the yellow offspring are heterozygous for color.

Explanation: do your chart

The offsprings could be yellow or green since the genotypes obtained after cross will be YY, Yy and yy Therefore, option (4) is correct.

What are Mendel' law?

The following is an outline of Mendel's laws of inheritance:

The principle of dominance is the foundation of the laws of inheritance. The law specifies that hybrid offspring will only inherit the dominant phenotype. The alleles that do not show in an individual are referred to as recessive traits, whereas the alleles that do manifest are referred to as dominant traits.

The alleles for each gene separate from one another during the process of gamete creation, ensuring that each gamete carries just a single copy of each allele for the genes that it contains. This is known as the law of segregation.

The law of independent assortment states that genes for various characteristics might segregate in an unrelated fashion while gametes are being formed.

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A restaurant owner wants to serve fresh-cut fruit. What factors
might be considered in choosing a recipe and preparation method?

Answers

Answer:

A factors  might be considered in choosing a recipe and preparation method is discussed below in details.

Explanation:

Explanation:

1.Oxidation- some fruit after slicing on vulnerable to air starts to oxidize this drives to a shift of color, this color shift could differ from light brownish to blackish brown in some fruits such as apple this could perform it appealing to the customer.

2. Shelf life- How prolonged can the fruits begin after disclosure to air before it starts to lose its gustation believing they are not eaten quickly. This has to acknowledge in choosing fruits.

3. Time- How long will it take to make and prepare the fruits ready, some fruits demands some thorough cleansing, expert cutting skill

if all will be possible and will match up the time needed for the fruits to be served.

List three ways in which a sperm cell differs from other cells in the
human body

Answers

A sperm cell is the smallest human cells. An egg cell and a sperm are each other opposites

PLSS HELP!!

1. cellular respiration produces

A. cellulose
B. oxygen
C. ATP
D. glucose

2. to produce starch, glucose molecules bond together through

A. photosynthesis
B. cellular respiration
C. dehydration synthesis
D. nucleotides

3. by which process does yeast produce the carbon dioxide responsible for bread rising?

A. photosynthesis
B. glycolysis
C. cellular respiration
D. dehydration synthesis

4. what is a component of amino acid not contained in starch?

A. amino acids contain carbon
B. amino acids contain oxygen
C. amino acids contains hydrogen
D. amino acids contain nitrogen

5. which two processes provide the glucose and nitrogen used to form amino acids in plants?

A. photosynthesis and nitrate absorption
B. cellular respiration and the citric acid cycle
C. photosynthesis and dehydration synthesis
D. glycolysis and nitrate absorption

Answers

Answer:

1. ATP

Explanation:

Cellular respiration produces ATP. Thus, the correct option is C. To produce starch, glucose molecules bond together through dehydration synthesis. Thus, the correct option is C.The process through which yeast produces the carbon dioxide responsible for bread rising is known as glycolysis. Thus, the correct option is B. A component of amino acid that is not contained in starch is nitrogen. Thus, the correct option is D. Photosynthesis and nitrate absorption are the two processes that provide the glucose and nitrogen used to form amino acids in plants. Thus, the correct option is A.

What is Cellular respiration?

Cellular respiration may be defined as the chemical process of breakdown of food in the cell with the liberation of energy in the form of ATP.

Photosynthesis is a chemical process through which green plants most photosynthetic algae synthesize their own food in the form of glucose. While nitrate absorption is the process through which nitrogen in the soil is significantly absorbed by the root of plants in form of nitrates.

Fermentation is initiated with the process of glycolysis, but it does not involve the upcoming two stages of aerobic cellular respiration such as the Krebs cycle and oxidative phosphorylation.

Therefore, each of the above questions is well described above.

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Clostridium Difficile (C. difficile) is a type of bacteria that increases its activity with most antibiotic use, and is therefore very difficult to treat. Research shows that the most effective way to prevent the spread of infection is frequent handwashing. However, many people have flat-out refused to wash their hands in hospitals. The government is contemplating passing a policy to make it mandatory for people entering hospitals to wash their hands or else risk not being seen by doctors and being escorted out of the building against their will. Do you think the government should go ahead with this plan?
Consider and discuss the legal, ethical or practical problems that exist for each action option and conclude with a persuasive argument supporting your decision.

Answers

Answer:

The government should not go ahead with this plan.

Explanation:

If the government decides to proceed with its plan to pass a law that authorizes the management of a hospital to force people who refuse to wash their hands out of a hospital and deny them medical care against their will, then the government will be infringing on people's right to life. While it is necessary to prevent the spread of Clostridium Difficile (C. difficile) , any law that is made to that effect must not abuse the right of access to medical care which is a fundamental right of citizens. This action will be ethically incorrect because it amounts to a government using a high handed approach in discharging its duties.

However, the intention of such a law is to protect the citizenry from the bacteria Clostridium Difficile (C. difficile) . If such a law is not passed, more people may become infected by the bacteria owing to the carelessness of other people. This situation is made worse because the organism is resistant to antibiotics.

However, since prevention of the spread of Clostridium Difficile (C. difficile) is Paramount, I opine that the government should continue to enlighten citizens and appeal to them on the need to practice regular hand washing in order to protect themselves and other people. Passing the said law is a draconian approach to the problem hence it is not in line with the ethics of modern civilization.

It is more civil to continue to appeal to citizens and sensitize them on the importance of regular hand washing as it affects the spread of Clostridium Difficile (C. difficile) .

An organism that has specialized cells is a(n) ______​

Answers

Answer: eukaryote. A eukaryote is an organism that has membrane bound nucleus and organelles, the DNA is contained in the nucleus, and the highly specialized organelles complete the the various functions of the cell. Some eukaryotes become highly complex, multi celled organisms. The individual cells then group into tissues, which form organs.
Hope I helped!

List what can possibly happen to a wave of light as it encounters objects. HURRY I NEED HELP!!!

Answers

Reflection, Refraction, and Diffraction

Pretty sure its Reflection, Absorbtion, and Transmission.

EASY 10 POINTS

Why do plant cells need chloroplasts?

Answers

Answer:

Chloroplasts are organelles found in plant cells and eukaryotic algae that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. In this respect they are similar to mitochondria, but are found only in plants and protista.

Explanation:

mark BRAINLIST!

thx

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