A machine has an efficiency of 80%. How much work must be done on the machine so to make it do 50,000 J of
output work?
12,500 J
40,000 J
62,500 J
90,000 J

Answers

Answer 1

Answer:

62,500 J

Explanation:

50,000/0.8=62,500

Answer 2

Answer:

62,500

Explanation:


Related Questions

What processes are necessary in order to turn sand into rock?

Answers

Answer: The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.

Explanation: thats the rock cycle.. yw

Answer:

Compaction and cementation

Explanation: I took the test and got it all right so i hoped this helped :)

name 3 non examples of bacteria.

Answers

Answer:

Fungi,plant cells and red blood cells

Explanation:

Bacteria are prokaryotic cell and so they lack a nucleus and therir genetic material lies naked in their cytoplasm. Ther are very small compared to eukaryotic cells such as plant cells, red blood cells and stem cells.  They're very large compared to viruses.

(Q005) Humans are unusual because our cultural practices can actually change our environmental circumstances. We can change the environment in which natural selection acts on our traits. Describe how this process has played out in the evolution of adult lactose tolerance. Can you hypothesize any similar situations where our future evolution may be influenced by cultural practices we have today

Answers

Answer:

Lactose tolerance conferred an evolutionary advantage, thereby this beneficial mutation increased its frequency in the population

Explanation:

Originally, adults were unable to digest lactose. But approximately 8,000-10,000 years ago something remarkable happened: a mutation near the gene that produces the lactase enzyme appeared in a raising cattle population from Europe-Middle East, making adults able to digest lactose. Nowadays, many adults from different societies are tolerant to digest lactose because this mutation increased its frequency and extended to different populations. It is a classical example of how a beneficial mutation may eventually become the most common gene variant by increasing its frequency in the population, and, subsequently extending to other populations. It is possible to hypothesize that new mutations associated with human activities may appear in current human societies, thereby conferring an evolutionary advantage in the same way that lactose tolerance in cattle-raising people. For example, nowadays, mutations in human behavior-associated genes might confer beneficial social skills (thereby increasing the frequencies across time or across populations).

3 The graphs show the reaction rate for an enzyme across a range of temperatures and pH.
Enzyme Reaction Rates
Rate of Reaction
inn
n
0
8
10
12
10 20 30 40
Temperature (°C)
Based on these data, this enzyme functions best at what temperature and pH?
A Temperature of 27°C and a pH of 4
B Temperature of 37°C and a pH of 6
C Temperature of 40°C and a pH of 8
D Temperature of 50°C and a pH of 10

Answers

B temperature 40 degrees Celsius and a pH of 6

A process that may return carbon to
the soil is

A. "locking" carbon.

B. decomposition.

C. respiration.

Answers

Answer:

B. Decomposition

Is your answer

The process of returning carbon to soil is referred to as decomposition. The correct option is C.

What is decomposition?

Decomposition, also known as rot, is the breakdown of dead organic matter into relatively simple organic or inorganic matter including such carbon dioxide, water, simple sugars, and mineral salts.

It is the way to transfer carbon back to the soil. Water is also decomposed into hydrogen and oxygen.

Thus, the correct option is B.

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this DNA strand consists of eight pairs of nitrogenous bases. how many different sequence of eight bases can you make? explain your answer.​

Answers

Answer:

In the sequence of 8, it would be 4 (possible bases) to the power of 8 because you need to multiply 4, eight times for the number of sequences. Therefore, the answer is 65, 536 possible sequences.

Explanation:

5 Some students were asked to identify which cells contain the greatest number of
mitochondria. They were given the following choices: blood, epidermal, cardiac, and
nerve cells. Which of the following is the best response?
A Blood cells, because they must carry oxygen throughout the body all the time,
which requires energy.
B Nerve cells, because energy is needed to relay messages throughout the body
C Cardiac muscle cells, because the heart must work all the time, requiring constant
energy.
D Epidermal cells, because the skin must constantly grow new skin cells, which
requires energy.

Answers

Answer:

C.) Cardiac muscle cells, because the heart must work all the time, requiring constant

Explanation:

Our heart muscles contain so much mitochondria because those muscles are very active in our body and require lots of energy to constantly pump blood through our circulatory system. Mitochondria produce energy in the form of ATP from glucose (sugar) in our cells.

why it is better to use a broad-spectrum sunscreen

Answers

Answer:

broad-spectrum sunscreen protects you from both. UVA rays can prematurely age your skin, causing wrinkling and age spots. UVB rays can burn your skin. Too much exposure to UVA or UVB rays can cause skin cancer.

A scientist was fishing in a pond and decided to collect a water sample to examine back in the lab.after looking in the microscope he saw a small aquatic organism.the organism appeared to have branchlike appendages coming out of his body.it seemed to be ingesting some smaller organism that appeared to be daphnia (water fleas)which kingdom should this organism be classified in?

A.fungi
B.eubacteria or archaebacteria
C.plant
D.animal

Answers

Answer:

The answer would be fungi

A. Fungi would be the answer.


Consider the following events that take place when rip
currents occur.
Which list shows the order of events in the productie
rip currents?
A. Waves travel to the beach.
B. Waves are trapped by the sandbars.
C. Waves reach the shore and go back to the ocean.
D. Waves speed up and flow between the sandbars.
E. Waves are broken by the sandbars.
O A, B, C, D, E
O A, D, C, B, E
O A, E, C, B, D
O A, E, C, D,B

Answers

Answer:

Its C, I took the quiz.

Explanation:

Sorry this is late

Answer:

c

Explanation:

The parasites responsible for malaria belong to which eukaryotic lineage?

Answers

Answer:

plasmodium

Explanation:

That is the eukaryotic linage of the parasite responsible for malaria

PLEASE HELP ME
What roles do photosynthesis and respiration play in
the distribution of gases in seawater?

Answers

Photosynthesis involves the use of energy from sunlight, water and carbon dioxide to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water. ... For example, both processes synthesize and use ATP, the energy currency.
2.) Seawater has many different gases dissolved in it, especially nitrogen, oxygen and carbon dioxide. It exchanges these gases with the atmosphere to keep a balance between the ocean and the atmosphere. This exchange is helped by the mixing of the surface by wind and waves. :)))

Which of the following is the covering of the muscle cell?

Question 6 options:

sarcomere


sarcoplasm


sarcolemma


sarcoplasmic reticulum

Answers

Answer:

sacomere

atau sacoplasmic reticulum

4. What material passes through a hole of a strainer when sieving
is used to separate mixtures?​

Answers

Answer:

Explanation:

A strainer is a device that is used to remove foreign/specific "dirt" from a liquid (usually when flowing). Strainers usually have holes just like a sieve except that this time, it separates dirt (tiny solids) from the liquid unlike a sieve that separates solid particles of different sizes.

It should however be noted that sometimes the strainer is designed to remove a valuable "dirt" from the flowing liquid.

Very small particles such as fine flour particles can pass through the hole of the strainer.

Those particles which are smaller in size of the hole of the strainer can pass through it while on the other hand, large particles can pass through it. Sieving allows the fine flour particles to pass through the holes of the sieve but prevent or stops the bigger particles from entering the sieve so we can conclude that very small particles can pass through the hole of the strainer but the large particles can't.

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without oxygen what will brain cells do

Answers

Answer:

They will die.

Explanation:

Without oxygen, the brain's cells cannot metabolize glucose, and therefore cannot convert glucose into energy. When your brain is deprived of oxygen, then, the ultimate cause of brain death is inadequate energy to power the brain's cells.

Answer:

Brain cells are destroyed after 4 to 6 minutes without oxygen

Explanation:

A liquid's resistance to flow is called
viscosity.
Odensity
O pressure.
O tension.

Answers

Answer:

Viscosity

Explanation:

Ive had this question on quizzes many times. And viscosity was the answer.

54:3
During the light-dependent reaction of photosynthesis, light energy is converted into which form of energy?
chemical
mechanical
othermal
electrical

Answers

Answer:

The answer would be chemical

Explanation:

This is because oxygen, carbon dioxide and sunlight is part of chemistry.

Below is Bohr model of an Atom. Scientists have claimed that the nucleus
of the atom is positively charged. In 3 - 5 sentences, describe a test (or an
experiment) to prove that this claim is true.

Answers

Answer:

Bohr claimed that the nucleus is positively charged . Though nucleus have protons and neutrons. Neutrons are neutral particles as they have no charge but protons are positively charged .

What rule of inference is used in each of these arguments? a) Kangaroos live inAustralia and are marsupials. Therefore, kangaroos are marsupials. b) It is either hotter than 100 degrees today or the pollution is dangerous. It is less than 100 degrees outside today. Therefore, the pollution is dangerous. c) Linda is an excellent swimmer. If Linda is an excellent swimmer, then she can work as a lifeguard. Therefore, Linda can work as a lifeguard. d) Steve will work at a computer company this summer. Therefore, this summer Steve will work at a computer company or he will be a beach bum.

Answers

Answer:

a) Simplification

b) Disjunctive syllogism

c) Modus ponens

d) Addition

Explanation:

Simplification (also known as conjunction elimination) is an immediate argument form by which is inferred, for example, that if the conjunction A and B is true, then consequently A must be true, and B also must be true. Modus ponens means in Latin "mode that by affirming affirms", this being a mode of deductive reasoning and a rule of inference. A hypothetical syllogism is a valid argumentation mode in which a syllogism, i.e., deductive reasoning that arrives at a specific conclusion by analyzing two different premises, may have a conditional statement for one or both of these premises. A hypothetical syllogism is associated with modus ponens in the way that sometimes it is considered to be a double modus ponens. Addition is a rule of inference that enables the introduction of disjunctions into logical proofs. For example, the rule of addition states that if P is true, then consequently P or Q must be true.

What happens at the end of the transcription process?

RNA is copied to form messenger RNA, also called mRNA.
DNA produces another copy of itself, also called dDNA.
RNA is copied into a duplicate copy of RNA, also called dRNA.
DNA produces messenger RNA, also called mRNA.

Answers

Answer:

DNA produces messenger RNA, also called mRNA.

Organisms can form several types of symbiotic relationships. From the descriptions, determine if each of the symbiotic relationships is an example of commensalism, mutualism, or parasitism. 1. Hermit crabs protect themselves from predators by living in shells discarded by snails. 2. Ticks attach to humans in order to eat human blood. Ticks can also infect humans with Rocky Mountain spotted fever and Lyme's disease. 3. The coralroot orchid is a reddish color and is unable to photosynthesize. These orchids take carbohydrates from pine trees through connections formed between their roots and the roots of the pine trees. 4. The bullhorn acacia grows special tissues in which ants live. The ants find a safe place to live and attack any animals that attempt to graze on the acacia. 5. The Leucochloridium worm infects snails and is able to control the snail's behavior, creating a zombie-like snail. The worm forces the snail to attract predators to itself so that the worm is eaten and passed to its next host. 6. On the Galapagos Islands, there are finches that remove parasitic insects from tortoises. The finches gain a meal and the tortoises are ridded of parasites. 7. Cattle egrets follow cattle and other large grazing animals and eat the insects stirred up by cattle's hooves.

Answers

Answer:

From the questions, here are the answers.

1 is commensalism

2. Parasitism

3. Parasitism

4. Mutualism

5. Parasitism

6. Mutualism.

7.Commensalism

Explanation:

Hermit crabs protect themselves from predators by living in shells discarded by snails and Cattle egrets follow cattle and other large grazing animals and eat the insects stirred up by cattle's hooves relationship is commensalism because commensalism is a symbiotic relationship that take place between two organisms in which one benefits and the other is neither harmed or does not benefit. Hermit crabs benefit by receiving protection from snail shells and snail does not benefit and not harmed. Cattles eagret feed on insects on cattle hoolves, cattle is not harmed or does not benefit

Parasitism

2. Ticks attach to humans in order to eat human blood. Ticks can also infect humans with Rocky Mountain spotted fever and Lyme's disease. 3. The coralroot orchid is a reddish color and is unable to photosynthesize. These orchids take carbohydrates from pine trees through connections formed between their roots and the roots of the pine trees and The Leucochloridium worm infects snails and is able to control the snail's behavior, creating a zombie-like snail. The worm forces the snail to attract predators to itself so that the worm is eaten and passed to its next host are parasitism relationship because parasitism is a relationship that exists between two organisms in which the other called the predator infect , harm or cause damage to the host organism. The above are parasitism relationship because they cause damage to their host.

Mutualism

The bullhorn acacia grows special tissues in which ants live. The ants find a safe place to live and attack any animals that attempt to graze on the acacia and On the Galapagos Islands, there are finches that remove parasitic insects from tortoises. The finches gain a meal and the tortoises are ridded of parasites exhibit mutualism relationship because mutualism is a symbiotic relationship that exists between two organisms in which both benefits from the relationship. The Acasia and the ants receive protection from the relationship. The finches and tortoise benefited from their relationship.

Compare What do complex organisms
have that makes them different from simple
organisms?

Answers

Answer:

Simple Organism

some simple organisms are made of single cell. Others are made of many cells that are similar

Complex organisms

in complex organisms, cells are organized into tissues, which make up organs. Organs form organ systems.

Explanation: im not sure if its correct but i hope it helps

(04.06 MO)
Which of the following is an advantage of aquaculture expansion?
1. Highly efficient
II. Uses less water
III. Uses less fuel
IV. Prevents disease
I and II only
Ob
I and III only
C
I, II, and III
Od
HI, III, IV

Answers

Answer:

1, 2 and 3. it's efficeint and uses less water and less fuel but a downside of aquaculture is that disease spreads fast, not slow.

Explanation:

i just turned in the assignment and it's right. check the assigned reading it says the answer

The advantage of aquaculture expansion is that this technique uses less fuel (Option III).

Aquaculture refers to the techniques involved in obtaining aquatic organisms in a controlled aquatic environment.

The aquaculture techniques include, among others, breeding, rearing, and harvesting fish and algae.

The main classes of aquaculture techniques may be divided into marine aquaculture and freshwater aquaculture.

In conclusion, the advantage of aquaculture expansion is that this technique uses less fuel (Option III).

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Please help fill in the blanks: The torso, which houses the apparatus consists of upper and lower cavities that are partitioned by the____#1____.The upper cavity is called the __#2___ (or colloquially the chest) and is almost totally filled with the heart and lungs; the lower the cavity, the abdomen or belly, contains much of the __#3__ and other organs and glands.

Answers

Answer:

The torso, which houses the apparatus consists of upper and lower cavities that are partitioned by the diaphragm.The upper cavity is called the thorax (or colloquially the chest) and is almost totally filled with the heart and lungs; the lower the cavity, the abdomen or belly, contains much of the digestive system and other organs and glands.

Explanation:

The torso is an important part of the body that contains many of our organs, and its integrity is fundamental to our survival.

The torso is divided into two big cavities (thorax and abdomen) by the diaphragm, the most important muscle involved in breathing. The diaphragm has three large openings that allow the passing of the esophagus, and some blood vessels and nerves from the thorax to the abdomen, and vice versa.

Inside the thorax there's the lungs and the heart, which are separated into specific cavities: the pleural cavity, formed by the two layers of a membrane that envelops the lungs called pleura; and the pericardial cavity, formed by the two layers of the pericardium, which surrounds the heart and the large vessels.

The abdomen holds most of the digestive system, like the stomach, the liver, and the intestines, and has other important organs as well such as the kidneys. The organs from the digestive system are held in place by another membrane called the peritoneum.

Which of the following statements correctly describes some aspect of protein excretion in prokaryotic cells? a Prokaryotes are unlikely to be able to excrete proteins because they lack an endomembrane system. b The mechanism of protein excretion in prokaryotes is probably the same as that in eukaryotes. c Proteins that are excreted by prokaryotes are synthesized on ribosomes that are bound to the cytoplasmic surface of the plasma membrane. d In prokaryotes, the ribosomes that are used for the synthesis of secreted proteins are located outside of the cell. e Prokaryotes contain large pores in their plasma membrane that permit the movement of proteins out of the cell.

Answers

Answer:

The correct answer is option c "Proteins that are excreted by prokaryotes are synthesized on ribosomes that are bound to the cytoplasmic surface of the plasma membrane".

Explanation:

Many prokaryotes secrete proteins, particularly, extracellular enzymes that have a function outside the cells and toxins that are not needed by the cell. As any other protein, proteins that are excreted by prokaryotes are synthesized on ribosomes  that are bound to the cytoplasmic surface of the plasma membrane. However, excreted proteins go to the general secretion (Sec) pathway, where they are tagged and further processed.

Which event occurred during the Space Race?


NASA was established.
The International Space Station was built.
The Soviet Union launched Salyut.
The United States launched Skylab.

Answers

Answer:

The International Space Station was built.

Explanation:

Answer:

A.) NASA was established.

Calculate the final concentration of BSA in the problems below using the formula

C1*V1 = C2*V2,

where C1 and V1 are the concentration and volume of the starting solution, and C2 and V2 are the concentration and volume of the final diluted solution. Include proper units and show your work for full credit.

A. 300 ul of 5 mg/ml BSA is added to 700 ul TBS



B. 50 ul of 1.5 mg/ml BSA is mixed with 450 ul H2O and 500 ul Bradford Reagent

C. 10 ul of 1 mg/ml BSA is mixed with 990 ul TBS.

D. 10 ul of 0.1 mg/ml BSA is mixed with 990 ul TBS.

Answers

Answer:

A. [tex]C_2=1.5\frac{mg}{mL}[/tex]

B. [tex]C_2=0.075\frac{mg}{mL}[/tex]

C. [tex]C_2=0.01\frac{mg}{mL}[/tex]

D. [tex]C_2=0.001\frac{mg}{mL}[/tex]

Explanation:

Hello.

In this case, we must compute the final concentration in all the cases so we solve for it in the given equation:

[tex]C_2=\frac{C_1V_1}{V_2}[/tex]

Thus, we proceed as follows:

A. Here, the final diluted solution includes the 300 μL of the 5 mg/ml-BSA and the 700 μL of TBS.

[tex]C_2=\frac{300\mu L*5\frac{mg}{mL} }{(300+700)\mu L}\\\\C_2=1.5\frac{mg}{mL}[/tex]

B. Here, the final diluted solution includes the 50 μL of the 1.5 mg/ml-BSA, the 450 μL of water and the 500 μL of TBS.

[tex]C_2=\frac{50\mu L*1.5\frac{mg}{mL} }{(50+450+500)\mu L}\\\\C_2=0.075\frac{mg}{mL}[/tex]

C. Here, the final diluted solution includes the 10 μL of the 1 mg/ml-BSA and the 990 μL of TBS.

[tex]C_2=\frac{10\mu L*1\frac{mg}{mL} }{(10+990)\mu L}\\\\C_2=0.01\frac{mg}{mL}[/tex]

D. Here, the final diluted solution includes the 10 μL of the 0.1 mg/ml-BSA and the 990 μL of TBS.

[tex]C_2=\frac{10\mu L*0.1\frac{mg}{mL} }{(10+990)\mu L}\\\\C_2=0.001\frac{mg}{mL}[/tex]

Best regards.

Identify What two words are used to describe
the number of cells in an organism?

Answers

multicellular and bionomial
Is it multicellular and unicellular?

Do all of the cells in your body look exactly the same and have
exactly the same function/job?

Answers

no, they do not all look the same or have exactly the same function/job

1. What did Linnaeus use to classify living things?

Answers

Answer:

Perhaps the single greatest contribution Linnaeus made to science was his method of naming species. This method, called binomial nomenclature, gives each species a unique, two-word Latin name consisting of the genus name and the species name. An example is Homo sapiens, the two-word Latin name for humans.

Explanation:

Can I have brainliest

It is from Google

Binomial nomenclature, which Carolus Linnaeus created, is a system for categorizing living things. Linnaeus was a Swedish botanist and biologist.

Binomial nomenclature is a biological system for naming organisms.

It is quite difficult to identify an organism internationally and keep track of the number of species when it has multiple local names.

Some of the features of binomial nomenclature that Linnaeus used to classify living things are:

Latin names are used because they are universal and consistent.

The process of naming each organism uniquely using the two words "genus" and "species."

The arranging of living things into a hierarchy, with each organism being given a position based on how similar it is to others.

Humans, for instance, are known as Homo sapiens. Its name, Homo, translates to "man" in Latin. The name of the species, sapiens, means "wise".

Therefore, Binomial nomenclature is used by Linnaeus to classify living beings.

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Which of the following graphs represent a function name two levels of government in the United States of America True or False: Clouds form when one condensation nucleus expands outward. A liquid's resistance to flow is calledviscosity.OdensityO pressure.O tension. what is the significance of the phrase all men are created equal in the declaration? A chain of car dealership got a shipment of 9,240 new cars. There are the same number of cars in every color. How many colors could there be? Which health issue is associated with exposure to indoor air pollution?O strokeO hair lossdiabetesO skin cancer What does the term "cutting-edge" suggestabout the walking stick described onpage 4? Drag Two choices to the box.How the walking stick is "cutting-edge"It is very popular.It is unlike most other tools of its type,It is still being developed.It was invented recently.It has an unusual appearance. Your teacher is going to make a video to advertise your school. The teacher needs students to help and there will be a meeting to discuss plans for the video. Write an email to a friend in another class about this. The answer pleaseeeeeee He did not want to serve in WWI because he thought taking a human life was wrong and violated the teachings of the bible, "thou shall not kill." He eventually changed his mind and decided to fight. He was awarded the Congressional Medal of Honor, the nation's highest medal awarded in the US military, for his heroism in combat. a Henry Cabot Lodge b Alfred Mahan c Teddy Roosevelt d Alvin York i just want to double check that this is correct. Which is not a topic of biology?a. the relationship between fungi and treesb. the distribution of sand on an ocean floorc. the chemicals at work in the stomachd. the speed at which a hummingbird flies Frank believes his bedroom wall measures 12 feet long.He has a ruler that is 1? feet long.He uses this ruler to measure his bedroom wall.Which equation can be used to solve for T,the number of times he will have to use the ruler to check the length of his bedroom wall? A. 1? = 12T B. 1? T = 12 C. 1? + T = 12 D. T 1? = 12 What is the value of k? Simplify: 2x + 4y - x + y A desire, rather than a need, to eat ? 1.Appetite2.Nutrition3.Hunger4.Calories Does anyone understand this? If you do can you please instruct me on how to do it or solve it? This one-measure excerpt from a melody is characterized by disjunct movement.TrueFalse I think of a number, multiply it by 2, subtract 3 and multiply the result by 4."