Heat Transfer Mechanisms 1.In your own words, using the pennies activity, define the three different heat transfer mechanisms. Your definitions should include:
(i) information about how energy is moving
(ii) what is happening microscopically (that is, at the atomic level)
(iii) what phase(s) of materials is usually involved.

Answers

Answer 1

Answer:

The three modes of heat transfer are: 1) Radiation 2) Convection 3) Conduction

Explanation:

RADIATION:

It is the mode of heat transfer which requires no medium because the transfer of energy takes place in the form of electromagnetic radiations. The spectrum of radiations that contribute to the heat transfer via radiation is the wavelength ranging from 0.1 μm to 100 μm.

For example the heat from the sun reaches the earth via radiation that passes through space and then through the atmosphere of the earth.

CONVECTION:

It is the mode of heat transfer that takes place in a fluid matter. The molecules in this case move from one place to another due to the difference in density developed as a result of heat absorption.

Example, the boiling of water. When the water in a utensil is heated, the heat is supplied at the bottom. In such a case the molecules of the water absorb the heat resulting in increased intermolecular spacing and hence the water at the bottom becomes the least dense in the bulk of water mass in the utensil hence rises up at to the free surface of the fluid mass. Then the densest mass of the fluid occupies the bottom space and is heated by the heat source supplied. This chain continues.

CONDUCTION:

This is the process of heat transfer from one molecule to the next neighbouring molecules. The propagation of heat energy occurs in a sequential manner starting from the molecule nearest to the heat source. The microscopic phenomenon happens in the form of lattice vibrations that are responsible for the transfer of heat energy via conduction.

Example, while heating of a pan the base heats up at first being continuously exposed to heat whereas the handle of the pan being far away from the source heats up after a long time.


Related Questions

Which statement accurately identifies the order of tissues pictures left to right in the microscopic image?

a) Epithelial cells, smooth muscle, connective tissue
b) Connective tissue, epithelial cells, smooth muscle
c) Epithelial cells, connective tissue, smooth muscle
d) Connective tissue, smooth muscle, epithelial cells

Answers

Answer:

The correct answer is - d)  Connective tissue, smooth muscle, epithelial cells.

Explanation:

The connective tissues are the tissue layers that protect the outside of arteries and veins. The thick outermost layer of a tunica adventitia and other, made of connective tissues.

The middle layer that has tunica media that s made up of outer connective and smooth muscles in the inner or middle and in the innermost layer is made up of epithelial layer.

As per the image given the statements that describe the tissues from the left to right in a microscopic image are connective tissue, smooth muscles, and epithelial cells.

The connective tissues support and protect and give stricture. The smooth muscles are involuntary non straighter muscles. The epithecal cells that line the surface of the body.

Hence the option D is correct.

Learn more about the statement accurately identifies.

brainly.com/question/23999747.

Which characteristics is common to all three groups of reptiles?

They use claws for defense.
They protect their eggs.
They have moveable eyelids.
They are ectotherms.

Answers

They are ectotherms.

hope it is helpful to you

Ectotherms because they are all cold blooded

How do organisms have a negative impact on the water cycle? And how can they affect other organisms with your answer? Please help.

Answers

Too much of one organism can cause an imbalance in the habitat because of its niche occupation

What is a population?
A. a group of organisms of different species interacting with each other and the environment
B. a single separate organisms separate from others of the same kind interacting with it's environmment
C.all the organisms of the same species who live in a specific environment and are capable of interbreeding.
D.a group of organisms and the non-living components interacting as a system

Answers

Answer:

What is population?

A group of organisms of different species interacting with each other and the environment is called populatin.

What are the two layers of the skin and the 1 layer below the skin?

Answers

Skin has three layers: The epidermis, the outermost layer of skin, provides a waterproof barrier and creates our skin tone. The dermis, beneath the epidermis, contains tough connective tissue, hair follicles, and sweat glands. The deeper subcutaneous tissue (hypodermis) is made of fat and connective tissue.07-Aug-2019

how does fertilization of angiosperm differ from fertilization in bryophytes​

Answers

Answer:

Fertilization in flowering plants happens through a process called pollination. Pollination occurs when pollen grains from the anther land on a stigma. ... Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule. After fertilization occurs, each ovule develops into a seed

số lượng protein thu được là bao nhiêu nếu tổng hợp phân tử protein chứa 100aa, trong mỗi phân tử đều chứa 20aa khác nhau

Answers

Explanation:

feg3fegrgt✴☝️☝️☝️☝️⛲

Answer:

protein number of collect is a bao nhiêu nếu protein phân tử tổng hợp chứa 100aa, trong mỗi phân tử đều chứa 20aa khác nhau

Explanation:

->1 phân tử chứa đủ 20 aa vậy ta cần 5 protein để tổng hộp thành 100aa

If the initial ratio of 14C to 12C in the bones was one part per trillion (the current ratio of 14C to 12C in the atmosphere), approximately what ratio would we expect in bones that come from wolves trapped 28,500 years ago

Answers

Answer:

For the bones of wolves trapped 28,500 years ago, the approximate ratio of carbon-14 to carbon-12, 14C to 12C, will be one part per 32 trillion.

Explanation:

Radioactive isotopes of elements are useful for many purposes. Carbon has three isotopes, carbon-12, carbon-13, and carbon-14. Of these,  carbon-14 is radioactive.

The half-life of an carbon-14 is used to determine the age of fossils in a process known as carbon-dating.

Carbon-14 has a half-life of approximately 5700 years. The half-life being the time for half the amount of the radioactive nuclei present in a radioactive element to decay.

The number of half-lives in 28500 years  = 28500/57000 = 5 half-lives

This means that the original amount of atoms present in the atoms has undergone radiactive decay five times.

The ratio of the original amount of 14C to the present amount of 14C = (1/2)⁵ = 1/32

Ratio of 14C to 12C that will be found in the bones = 1/32 × 1/ 1 trillion = 1/32 trillion.

Therefore, for the bones of wolves trapped 28,500 years ago, the approximate ratio of carbon-14 to carbon-12, 14C to 12C, will be one part per 32 trillion.

DNA is transcribed into RNA, then RNA is translated into amino acids we can build into proteins

Answers

During transcription, the enzyme RNA polymerase (green) uses DNA as a template to produce a pre-mRNA transcript (pink). The pre-mRNA is processed to form a mature mRNA molecule that can be translated to build the protein molecule (polypeptide) encoded by the original gene.

Match each of the following skull features with its correct bone.

a. styloid process
b. infraorbital foramen
c. sella turcica
d. foramen magnum
e. coronoid process
f. crista galli

1. ethmoid bone
2. sphenoid bone
3. temporal bone
4. mandible
5. maxilla
6. occipital bone

Answers

Answer:

The left column contains structures of the bones that belong to the right column.

a) styloid process - 3) temporal bone

b) infraorbital foramen - 5) maxilla

c) sella turcica - 2) sphenoid bone

d) foramen magnum - 6) occipital bone

e) coronoid process - 4) mandible

f) Crista galli - 1) ethmoid bone

Explanation:

The inferior part of the petrous temporal bone forms the styloid process that allows the stylohyoid, stylopharyngeus, and styloglossus muscles to attach with styloid ligaments.

The infraorbital foramen is the opening of the maxillary bone of the skull

sella turcica is a saddle-like structure in the body of the sphenoid bone of the skull.

The foramen magnum is the lower part of the cranial  foss that allows the connecting brain and spinal cord and it the opening

The coronoid process is shoulder joint as well and required mandibles in the skull to form.

Crista galli arises from ethmoid bone that is thick and midline triangular but smooth process.

Which factors improve soil fertility? Select the three correct answers.

A. Nitrogen
B. Humus
C. Manure
D. Horizons
E. Bedrock​

Answers

A.Nitrogen
B.Humus
c.Manure
hope this helps

How do plant cells that do not have chlorophyll get food?​

Answers

Answer:

All plants cells have chlorophyll so there is no problem

it is responsible for being bidirectional of the cell membrane​

Answers

Answer:

I believe it is Cholestral

Explanation:

Plants are susceptible to bacterial infections, which can damage their structure or even kill them. Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
A) a drug that interferes with mitochondria function.
B) a drug that disrupts cell wall structure and function.
C) a drug that destroys the central vacuole.
D) a drug that blocks gene expression in circular chromosomes.

Answers

Answer:

The correct answer is: D) a drug that blocks gene expression in circular chromosomes.

Explanation:

Antibiotics are the drugs that are mostly used when it comes to treating bacterial infections because of their effective mechanisms in killing bacteria and/or preventing their spread.

Bacteria have the ability to colonize and infect different organisms by making use of highly diverse mechanisms, some of which involve the use of toxins or the inhibition of the host's immune system.

Bacteria are prokaryotic individuals - instead of having a nucleus containing DNA in multiple chromosomes like eukaryotes have, they have one single circular chromosome that holds all or most of all their genetic information. If we wanted to treat a plant (which is a eukaryotic being) for a bacterial infection, we should aim to block the expression of genes in circular chromosomes, which is a distinct feature in bacteria.

If we were to give the plant a drug that interferes with mitochondria function or destroys the central vacuole, we would only be affecting plant cells and probably killing the plant. A drug that disrupts cell walls would affect the bacteria but would kill the plant as well (both organisms have cell walls). The only viable option out of the mentioned is using a drug that inhibits gene expression in circular chromosomes.

Please help!! Im gussing it’s either Y or Z

Answers

Answer:

The answer is Y

Explanation:

Trust me I've done this before

Hexokinase is an enzyme that catalyzes the ATP‑dependent phosphorylation of glucose to glucose‑6‑phosphate.

a. True
b. False

Answers

Answer: The statement is TRUE

Explanation:

HEXOKINASE is an enzyme that catalyzes the phosphorylation of glucose to glucose‑6‑phosphate in glycolysis. The main function of glucose is to provide energy for the tissues. The basic pathway through which energy is gotten from glucose is through GLYCOLYSIS. The glycolytic pathway is made up of enzyme catalyzed reactions that leads to the conversion of glucose to pyruvate in the presence of oxygen or lactate in the absence of oxygen.

The first step in glycolysis is catalyzed by HEXOKINASE, an enzyme with broad specificity that catalyzes the phosphorylation of six-carbon sugars. Hexokinase phosphorylates glucose using ATP as the source of the phosphate, producing glucose-6-phosphate, a more reactive form of glucose.

Therefore the above statement is TRUE.

In snapdragons petal color is an incomplete trait. If RR results in a red flower and rr results in white flowers, Rr would result in ____________ flowers. Group of answer choices red flowers with white splotches pink striped flowers red and white flowers

Answers

Answer:

Pink Striped flowers

Explanation:

Incomplete traits result in a "mixing" of 2 traits.  So with a Rr individual, there will be pink striped flowers.

Answer:

Rr would result in a pink and white flower.

Explanation:

The traits of each parent are neither dominant or recessive. The alleles do not blend, but partial dominance is often referred to as “blending” because traits are mixed and appear to be “blended.” In this case, it will be BOTH pink and white.

Molecules produced in the nucleus are transported to the cytoplasm via?​

Answers

Answer:

Molecules produced in the nucleus are transported to the cytoplasm via endoplasmic reticulum.

A population has adopted an evolutionarily stable strategy (ESS) in regards to cooperation or defection. If a new mutant strategy appears that causes an opposite behavior from the norm, which of the following will result?
A. The mutant strategy will not be able to increase in numbers in the population under the influence of natural selection.
B. Antagonistic pleiotropy will allow an equilibrium in which both strategies are maintained in the population.
C. The members of the population using the original strategy will act with aggression toward those exhibiting the mutant strategy.
D. The evolutionarily stable strategy will be displaced because of natural selection in favor of the mutant strategy.
E. Natural selection will maintain the mutant strategy because the variation in strategy may be useful in future environments.

Answers

Answer:

A. The mutant strategy will not be able to increase in numbers in the population under the influence of natural selection.

Explanation:

An evolutionarily stable strategy (EES) can be defined as a strategy that is competitively superior to others strategies and cannot be replaced or invaded by any other strategy through natural selection, resulting in punishment for those who deviate from it. Thus, an EES may confer a higher reproductive/adaptive fitness than alternative strategies when it is adopted by most members of the population. Individuals having an ESS are 'spiteful' because they act not only to increase their payoffs but also to decrease the payoffs of their competitors. An EES is resistant to low levels of mutation when all individuals in the population have the same strategy. In game-theoretical terms, an ESS is a strategy such that if all the members of a population adopt this strategy, then no mutant strategies could invade the population under natural selection. In consequence, when all individuals of a population adopt an EES, mutant phenotypes cannot invade and displace the ESS.

Which gas is exhaled along with used air?




SCIENCE QUESTION... ☺️​

Answers

Explanation:

When we take a breath, we pull air into our lungs that contains mostly nitrogen and oxygen. When we exhale, we breathe out mostly carbon dioxide.

25 POINTS!! If you chemically synthesized the DNA molecule ATGCCGAATG from individual nucleotides, what would be present in solution besides the DNA?

A. phosphate

B. RNA

C. lipids

D. glucose

Answers

Answer:

option a

Explanation:

Look at the picture of a leaf-cutter ant.
Based on this picture, which prediction can be made about leaf-cutter ants?
A. They eat trees for energy.
B. They produce hundreds of offspring at a time.
C. They cannot see color.

Answers

Answer:

The Answer is -They are strong enough to lift an entire leaf

Explanation:

Based on the picture of a leaf-cutter ant. The prediction that can be made about leaf-cutter ants is they are strong enough to lift an entire leaf. The correct option is D.

What is a leaf-cutter ant?

Leaf-cutter ants develop their fungus crop by using leaves as fertilizer. By providing freshly cut leaves, they develop fungal gardens while guarding against pests and molds and removing dead materials. The fungus serves as a food supply for the ant larvae in exchange.

These eager ants may seem to bite off more than they can chew, but in reality, they are capable of carrying leaf fragments that are nearly 50 times heavier than themselves. That's like a person pushing a car around.

Therefore, the correct option is D. they are strong enough to lift an entire leaf.

To learn more about leaf-cutter ants, refer to the link:

https://brainly.com/question/29309882

#SPJ2

Record the disorder revealed in the karyotype below.
I need help

Answers

Answer:

i don't have that alien eys

you do have

in one word this photo is not clear for my eyes

[tex]1 \sqrt{ \frac{ \frac{24 \frac{ \frac{21150 \sqrt{ \cot( \alpha ) } }{?} }{?} \times \frac{?}{?} \times \frac{?}{?} }{?} }{?} } [/tex]

What could a dog living now and a cat living thousands of years ago have in
common?
A. They have the same bone structure.
B. They have some of the same matter.
C. They have the exact same DNA.
D. They have the same amount of energy.
SUBMNT

Answers

Answer:

b

Explanation:

not all dna is the same and energy depends on diet along with cats and dogs having different bone structure.

Which type of RNA functions as the location where proteins are made? mRNA rRNA tRNA siRNA

Answers

Answer: rRNA

Explanation: mRNA is the messenger RNA (sequence determined by DNA) and it exits the nucleus and meets the tRNA (transfer RNA) in the ribosome or more specifically the rRNA (answer). I’m not sure what siRNA is, but I’m 99% sure the answer is rRNA.

The type of RNA that functions as the location where proteins are made would be the rRNA.

rRNAs are known as ribosomal RNAs. They are usually found associated with the ribosome - the organelles responsible for synthesizing proteins in eukaryotic cells.

mRNA is the messenger RNA. They are formed directly from the transcription of DNA in the nucleus and then transported to the cytoplasm. They carry genetic information in coded forms and the codes are translated protein synthesis.

tRNA is the transfer RNA. It carries amino acids and anticodons.

siRNA are small interfering RNA.

More on the RNAs can be found here: https://brainly.com/question/19815744

Back to the cute little pigs. What are the possible parents of the following groups of guinea pigs. Give all possibilities. You do not need to show Punnett Squares, just the possible parents. There may be more than I answer for each. Case 1: 50 % of the offspring are black Case 2: 75 % of the offspring are black Case 3: 50 % of the offspring are hybrid black Case 4: 100 % of the offspring are black Case 5: 100 % of the offspring are white Case 6: 50 % of the offspring are white Case 7: 25 % of the offspring are white​

Answers

Answer:

Case 1 ⇒ Bb   x   bb ⇒ F1 = 50% Bb, black + 50% bb, white

Case 2 ⇒ Bb   x   Bb ⇒ F1 = 75% Black + 25% white

Case 3 ⇒ Bb   x   Bb ⇒ F1 = 25% BB + 50% Bb + 25% bb

            ⇒ Bb   x   bb ⇒ F1 = 50% Bb + 50% bb

Case 4 ⇒  BB   x   BB ⇒ F1 = 100% BB Black

            ⇒ Bb   x   BB ⇒ F1 = 50% BB + 50% Bb = 100% Black

            ⇒ bb   x   BB ⇒ F1 = 100% Bb black

Case 5 ⇒ bb   x   bb ⇒  F1 = 100% bb white

Case 6 ⇒ Bb   x   bb ⇒ F1 = 50% Bb black + 50% bb white

Case 7 ⇒ Bb  x  Bb ⇒ F1 = 75% black + 25% white

Explanation:

Due to technical problems, you will find the complete explanation in the attached files

Which of the following is true about evaluating an experiment?

A)Evaluating an experiment allows the investigator to find errors and make improvements.
B)Evaluating an experiment is not important or required.
C)Evaluating an experiment can change the prediction.
D)Evaluating an experiment can make it more confusing.

Answers

Answer:

The correct answer is - A) Evaluating an experiment allows the investigator to find errors and make improvements.

Explanation:

Evaluation is the process in any experiment that helps in improving the analysis and remove missing components and errors to get better results. It also checks if all the process is included and running properly without error.

One should constantly be evaluating his or her experiment. It includes assessing how the experiment is going as you carry it out, what could have been improved if it was to be carried out again and how can eliminate any erros.

ở một loài thực vật, xét 2 cặp gen phân li độc lập A,a và B, b, mỗi gen quy định 1 tính trạng, alen trội là trội hoàn toàn. Tiến hành mmotj phép lai giữa hai cây, thu được F1. Thep lý thuyết, kiểu hình mang hai tính trạng trội ở F1 không thể chiếm tỷ lệ:
A: 12,5% B: 37,5%

Answers

I am sorry I just wanted points for my answer and I am sorry again I needed points

economic importance of mosquito larva list five​

Answers

Explanation:

economic importance of mosquito larva are

Mosquito larvae grow by consuming microorganisms such as algae and microbes that decompose decaying plant material. Larval mosquitoes contribute to aquatic food chains by serving as food sources for many predators, including fish and birds.i hope it will help you

Proteus vulgaris has a doubling time of roughly 28 minutes. If an initial population of 500 cells is allowed to grow for 6 hours in ideal conditions, what will be the final population? Use three significant figures for your final answer.

Answers

Answer: The final population of Proteus vulgaris after 6 hours is [tex]3.71\times 10^{6}cells[/tex]

Explanation:

We are given:

Proteus vulgaris divides and doubles every 28 minutes

Total time given = 6 hours = 360 min      (Conversion factor: 1 hr = 60 min)

Number of times Proteus vulgaris doubles in 6 hours = [tex]\frac{360min}{28min}=12.857times[/tex]

Calculating the number of bacteria after 6 hours under ideal conditions:

We are given:

Initial population = 500 cells

Number of times it doubles = 12.857 times

Final Proteus vulgaris population = [tex]500\times 2^{12.857}=3709476.8=3.71\times 10^{6}cells[/tex]

Hence, the final population of Proteus vulgaris after 6 hours is [tex]3.71\times 10^{6}cells[/tex]

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