Lab #: 11
Skill: Planning and Design
Date:
Title : Metals and Non-metals
Topic: Rust Prevention
Problem Statement:
Johnson had some machines in his garage. He noticed that some of the mechanical parts started to cease up so he removed the rust by rubbing some of them with a steel brush and some with sanding paper where appropriate. Two days later when he checked on them, he noticed that they started to rust again. He needed to do something to prevent or slow down the rate of rusting. His neighbour told him that he needed to lubricate the mechanical parts with an oil-based substance. Therefore, he searched around the house to see what he could find. He found some kerosene oil, cooking oil, Vaseline/petroleum jelly and a jar of old red grease. He wondered which of the chemical substances would be most effective in preventing/reducing rusting.
Answer:
Hypothesis:
Based on prior knowledge, it is hypothesized that the petroleum jelly or old red grease would be the most effective substance in preventing or slowing down rusting, as they have thicker and longer-lasting protective layers compared to the other substances.
Experimental Design:
Johnson can label each of the mechanical parts to ensure that each part is treated with a different substance.
Johnson can apply each substance to a separate part of the mechanical parts using a brush or cloth.
Johnson can observe the mechanical parts over a period of time and record any changes, including the appearance of rust.
Johnson can rate the effectiveness of each substance in preventing rust, based on the amount of rust that appears on each part after a set period of time.
Data Collection:
Johnson can observe the mechanical parts at regular intervals, such as once a day or once a week, and record any changes he notices. He can also take photographs of each part to track the changes over time.
Data Analysis:
After a set period of time, Johnson can rate the effectiveness of each substance in preventing rust, based on the amount of rust that appears on each part. He can also compare the appearance of each part to the photographs he took earlier to confirm the rate of rusting.
Conclusion:
Based on the results of the experiment, Johnson can determine which substance is most effective in preventing or slowing down rusting. He can then apply that substance to all of his mechanical parts to prevent rusting in the future.
Explanation:
I have a horrible upcoming arbic test and need help asap, I will put brainliest and whatever else you'd like
Explanation:
yeah i can help if you want
What do these passages in scene 2 suggest about the effect of duncan's death in macbeth
Well, it was sad but Macbeth wanted to be king because not only the 3 Witches told him he was going to be king but his wife was controlling and evil not just that he didn't want to do it his wife made him do so because she said no husband of mine is going to not be less of a man. But the plan was to get everyone to sleep and when no one was looking Macbeth made his decision that I thought was wrong and actually made him king was the disappearance of King Duncan.
Solve -0.25+1.75x<-1.75+2.25x
Answer:
I think it's x<3.
If I got it right...
MARK ME AS BRAINLIEST
Louis Pasteur developed the germ theory of disease, which states that many diseases are caused by microorganisms. Had scientists been skeptical but not open-minded about the idea,
it would not have been published in journals.
it would have been accepted without evidence.
it would not have become scientific consensus.
it would have been reproduced by other scientists.
Had scientists been skeptical but not open-minded about the idea, it would not have become scientific consensus.
What is the germ theory of disease?Skepticism is an important part of the scientific process, and scientists are expected to critically evaluate new ideas before accepting them as true.
On the other hand, if the scientific community had blindly accepted Pasteur's theory without evidence, it would not have been a scientific approach, and the theory may not have been taken seriously by other scientists.
Finally, if Pasteur's theory had been reproduced by other scientists and found to be valid, it may have gained more acceptance among the scientific community. Replication is a critical part of the scientific process, as it helps to confirm the validity of new discoveries and theories.
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A zoology student is investigating whether it is true that the gender of turtles depends on the temperature at which the turtle eggs are kept before they hatch. He will test if turtle eggs incubated at 29–30 degrees Celsius produce females, and eggs at 24–26 degrees Celsius produce males. What is the independent variable?
time
gender
species
temperature
Answer:
Temperature
Explanation:
Temperature is the independent variable
In the Spanish language, why is the letter C pronounced as a /c/ sound when hard and a /th/ sound when soft?
Answer: its a story
Explanation:
long story short the medieval king of Spain spoke with a lisp. Wanting to imitate royalty, courtiers picked it up. The resulting th sound wormed its way into the Spanish language.
In about what year was the Odyssey composed?
around the 8th or 7th century BC
extra info : the odyssey became part of the greek literary canon in the mid-6th century
Could someone help me type up a small Japanese powerpoint about my family? each of these will be a slide. I put blanks for my safety, in those spots put [name] or [age] etc so i can fill them in myself. Please type these in the order below.
My name is [name], i am [age] years old and in 9th grade. I go to [school]
My dad’s name is [name] and he is an engineer. He is [age] years old.
My mom’s name is [name] and she is a waitress. She is [age] years old.
My older brother’s name is [name]. He is [age] years old.
This should be typed in basic hiragana
Thank you, i know it is a bit much
Here is a basic way a PowerPoint can be presented about "my family" in Japanese.
How to make a Japanese PowerPoint?A sample PowerPoint presentation about your family in basic hiragana:
Slide 1: わたしの家族 (My Family)
Title slide with a picture of your family (optional)
Slide 2: わたしの名前 (My Name)
わたしの名前は[name]です。[age]歳で、中学1年生です。[school]に通っています。
(My name is [name]. I am [age] years old and in 9th grade. I go to [school].)
Slide 3: 父の名前 (My Dad's Name)
わたしの父の名前は[name]です。彼はエンジニアです。[age]歳です。
(My dad's name is [name] and he is an engineer. He is [age] years old.)
Slide 4: 母の名前 (My Mom's Name)
わたしの母の名前は[name]です。彼女はウェイトレスです。[age]歳です。
(My mom's name is [name] and she is a waitress. She is [age] years old.)
Slide 5: 兄の名前 (My Older Brother's Name)
わたしの兄の名前は[name]です。彼は[age]歳です。
(My older brother's name is [name]. He is [age] years old.)
Slide 6: 家族写真 (Family Photo)
Final slide with a family photo (optional)
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il give 9 stars if someone gets this correct don't lie cuz I can redo it to see if it wrong but who get it right get 9 stars
Answer:
The line from the poem that contains an example of alliteration is:
"A campfire crackles in a crowd"
The repetition of the "c" sound in "campfire" and "crackles" creates an example of alliteration.
What is the reason for the common use of letter C in the Irish language and the rare use of the letter K and Q in the Irish language?
Answer:
The Irish language historically did not use the letters K and Q, and the letter C was used instead. This was because the Irish language originated before the introduction of the Latin alphabet, and the original Irish alphabet consisted of 20 letters. When the Latin alphabet was introduced, it was modified to fit the Irish language, with the addition of the letters H, J, K, Q, V, W, X, Y, and Z. However, since these letters were not originally a part of the Irish alphabet, they were rarely used and were eventually phased out of common usage. The letter C, which was already a part of the Irish alphabet, continued to be used as a substitute for the letters K and Q. Today, the Irish language only uses 18 letters in its modern alphabet: A, B, C, D, E, F, G, H, I, L, M, N, O, P, R, S, T, and U.
Explanation:
Me, she had dispensed from joining the group; saying, "She regretted to be under the
necessity of keeping me at a distance; but that until she heard from Bessie, and could
discover by her own observation, that I was endeavouring in good earnest to acquire
a more sociable and childlike disposition, a more attractive and sprightly manner--
something lighter, franker, more natural, as it were--she really must exclude me from
privileges intended only for contented, happy, little children."
What does the term endeavoring mean as it is used in the passage?
A. thinking
B. doing
C. attempting
D. socializing
The term endeavoring means attempting. Option C
What does it mean to endeavor?The term "endeavoring" means attempting in the passage. It refers to the protagonist's efforts to acquire a more sociable and childlike disposition, a more attractive and sprightly manner.
To endeavor means to make a concerted effort or attempt to achieve a goal or complete a task. It implies a persistent and determined effort towards achieving something. The term is often used to describe a diligent and sustained effort to overcome obstacles, solve problems or improve oneself in some way. Endeavoring requires commitment, hard work, and perseverance. It is a proactive approach to achieving something that requires a focused and sustained effort over time.
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Is the Turkish language slowly dying out? If yes explain why
Answer:
No, the Turkish language is not slowly dying out. In fact, it is a vibrant and widely spoken language with over 80 million speakers worldwide.
Turkish is the official language of Turkey and is also spoken by significant populations in countries such as Cyprus, Azerbaijan, and parts of the Balkans. It is also a recognized minority language in several countries, including Greece, Iraq, and Romania.
There are several reasons why Turkish is not dying out. Firstly, the Turkish government has taken significant steps to promote the use of the Turkish language both domestically and internationally. This includes the establishment of language institutes, the development of language learning materials, and the organization of Turkish language proficiency exams.
Secondly, Turkish is a major language of instruction in schools in Turkey, and there is a strong emphasis on language education in the country. Additionally, Turkish is widely used in the media, entertainment industry, and business world, which further reinforces its position as a vital and thriving language.
Finally, while there are some concerns about the impact of globalization and the increasing use of English as a lingua franca, Turkish remains an important language in its own right and is valued by its speakers for its cultural and historical significance.
In summary, there is no evidence to suggest that the Turkish language is slowly dying out, and it remains a significant and widely spoken language with a rich cultural heritage.
Why are the romanizations of Korean and Japanese both dying out?
Answer:
The use of romanization for Korean and Japanese is not necessarily dying out, but rather there is a trend towards using the native scripts for these languages in written communication.
Explanation:
In the past, romanization was commonly used to transcribe Korean and Japanese words and phrases into the Latin alphabet, which allowed for easier communication between speakers of different languages. However, as more people learn these languages and become familiar with their writing systems, there has been a shift towards using the native scripts in both languages.
In Korean, the government has made a concerted effort to promote the use of the Korean alphabet, known as Hangul, in written communication. This has led to a decrease in the use of romanization, although it is still used in certain contexts such as for international names or in language learning materials.
Similarly, in Japanese, the use of the native script, including hiragana, katakana, and kanji, is widespread, and romanization is primarily used in contexts such as for international names or for language learners.
Overall, while the use of romanization is not necessarily dying out completely, there has been a trend towards using the native scripts for Korean and Japanese as more people become familiar with these writing systems.
[tex] \: [/tex]
Irvin is a pharmacy technician making an antibiotic solution for a patient. He has 20% solution and needs to make a 5% solution. The patient also needs to take 5 mL of solution each day for two weeks. Which best describes how Irvin should make the drug?
To make a 5% solution, The correct answer is option A: He should make 25 mL of the 20% solution in 75 mL of solvent.
What is the antibiotic solution about?To make a 5% solution, Irvin needs to dilute the 20% solution with solvent (usually water) to lower its concentration. The final volume of the solution should be enough to provide the patient with 5 mL of the drug each day for two weeks.
Therefore, This will result in a total volume of 100 mL of 5% solution. Irvin can measure 25 mL of the 20% solution and mix it with 75 mL of solvent (water) to get the desired concentration. The final solution will contain 5 mL of the drug per dose, which is the correct amount for the patient to take each day for two weeks.
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See full question below
Irvin is a pharmacy technician making an antibiotic solution for a patient. He has 20% solution and needs to make a
5% solution. The patient also needs to take 5 mL of solution each day for two weeks. Which best describes how
Irvin should make the drug?
O He should make 1. 25 mL of the 20% solution in 68. 75 mL of solvent.
O He should make 8. 75 mL of the 20% solution in 26. 25 mL of solvent.
O He should make 17. 5 mL of the 20% solution in 52. 5 mL of solvent.
He should make 20 mL of 20% solution in 15 mL of solvent.
Why is the Tunisian Arabic language dying out?
Answer:
Aside from the sheer number of non-Arabic speakers, the biggest threat to Arabic in the Gulf region is the shift to English as the language of higher education.
Explanation:
How do the pronounciation of letters D and T vary by each Irish dialect and how are they pronounce in each dialect of Irish? Someone please answer me in 250 words or more
Here is an explanation for how the pronunciation of letters D and T vary by each Irish dialect and how are they pronounce in each dialect of Irish.
What is the justification for the above response?In Irish, the pronunciation of the letters D and T varies between dialects.
In Connacht Irish, both D and T are pronounced as a dental fricative, which sounds like the "th" in "thin" in English.
In Munster Irish, D and T are pronounced as dental stops, which means that the tongue makes contact with the teeth but does not release air, resulting in a softer sound than the dental fricative.
In Ulster Irish, D and T are pronounced as velarized dental stops, which means that the tongue touches the teeth and the back of the tongue touches the soft palate, resulting in a more guttural sound.
It's important to note that these are general patterns and that there may be further variations within each dialect and even within individual speakers. Thus, Irish pronunciation can be challenging for English speakers, as it involves many sounds that do not exist in English.
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Why is the Finnish language declining along with Icelandic?
The Finnish language and Icelandic are two very different languages, and the reasons for their decline are not necessarily related. However, both languages do face challenges that could contribute to their decline.
What is the Finnish language?In the case of Finnish, one reason for its decline could be the increasing use of English in Finland, especially among younger generations. English is often seen as a more global language, and many people in Finland may prefer to use it in business, academia, and other domains. Additionally, immigration and increased diversity in Finland could also play a role in the decline of the Finnish language, as some immigrants may not speak Finnish or may not prioritize learning it.
Therefore, In the case of Icelandic, the language faces similar challenges with the increasing use of English and globalization. Additionally, the relatively small population of Iceland (around 360,000 people) means that there is limited demand for Icelandic language materials, making it difficult for publishers and other content creators to produce and distribute content in Icelandic. This, in turn, can lead to a lack of resources for teaching and learning the language, which could contribute to its decline.
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Why is the Slovak language dying out?
For those who want to learn japanese, How do you spell "Hi/ Hello" in Japanese?
Answer:やあ
I got やあ because I wanted to try to learned Japanese and I took a long time so I ask help from only one or two of my family members
Answer:こんにちは
Kon'nichiwa
Explanation: This is how you say Hello/Hi in Japanese.
Is the Norwegian Bokmål language technically dying out? If yes explain why
Answer:
No the Norwegian Bokmål language is not dying out.
Explanation:
Norwegian people still know and use Bokmål and often encourage new leaners to start with it instead of Nynorsk. Around 80% of people in Norway still use Bokmål regularly in their daily life's to. That is to say that some might prefer one over the other but they still value knowing both languages and their differences.
Essay on games and sports
Answer:
Sports And Games Essay: Sports and Games are very essential activities for physical and mental development. Whether played sitting on a chair, like a game of chess, or played outdoor like volleyball, games are always good for either mind or body or both. A good sport has many advantages on an individual, including stamina buildup, toned reflex, quick response, confidence buildup and a positive attitude. Apart from psychological and physical developments, sports also develop the personality my instilling communication skills, leadership skills and team work. Sports and Games are essential for persons of every age group to keep him/her physically fit and mentally sound. mark me brainliest please
Is the Japanese language slowly dying out? If yes, explain why is that
No, the Japanese language is not slowly dying out.
What is the justification for the above response?The Japanese Language it is one of the most widely spoken languages in the world, with over 125 million speakers, including both native speakers in Japan and speakers in other countries.
Japanese is also a language of business, entertainment, and technology, and is often studied as a second language by non-native speakers.
While it is true that the birth rate in Japan has been declining, and there are concerns about the aging population, this does not necessarily mean that the Japanese language is dying out.
The government has implemented policies to promote the use of the Japanese language, and there are also efforts to preserve and promote Japanese culture and heritage both within Japan and around the world.
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Why is the Persian/Farsi language dying out?
Answer:
The main reason why the Persian language is dying out is because the speakers that speak this language are shifting to main language streams like English because there are higher economic opportunities like jobs and careers, when speaking mainstream languages.
Describe a child sitting on a bench in the mall engrossed in his mobile
Answer:
He was sitting on a bench outside the mall entrance, his eyes glued to the screen. It was like he was addicted to the phone.
Explanation:
I described a child sitting on a bench in the mall engrossed in his mobile.
Прочитай предложение и определи, в каком слове не совпадает количество букв и звуков.
Незнакомец со стоном поднял кверху бледное лицо и кивнул головой
Why is the Norwegian Bokmål language starting to die out and be replaced?
Answer:
Not a lot of people have been speaking this particular language. After the death of Walter Sutherland, the last known person to speak this language people knew it was going to go extinct.
Explanation:
Define positive stress and state three way it may benefit you
Stress that lasts for a short time can boost job performance while increasing alertness. Healthy amounts of stress can even help build relationships essential for our health. Stress is also vital for our memory. It allows us to recall the inevitable consequences of our actions to help us avoid them again in the future
PLS I NEED HELP Reread the passage from Anne's diary below:
"BBC broadcast in German, Dutch, French, and other languages at ten: The invasion has begun! So this is the "real" invasion. BBC broadcast in German at eleven: speech by Supreme Commander General Dwight Eisenhower.
BBC broadcast in English: "This is 0 Day." General Eisenhower said to the French people: "Stiff fighting will come now but after this the victory. The year 1944 is the year of complete victory. Good luck!"
Which phrases or sentences best support the claim that the mood of this passage is determined and optimistic? (PICK TWO)
a.BBC broadcasts in German, Dutch, French, and other languages at ten.
b.The year 1944 is the year of complete victory. Good luck!"
c.BBC broadcast in English: "This is 0 Day."
d.Stiff fighting will come now but after this the victory.
10 POINTS
A runner wears a wrist device that tracks distance, speed, and number of steps. What kind of power source would the sensors in the device be using when the wearer is running?
an internal battery
a charger with an adapter to a wall socket
a Wi-Fi signal
a Bluetooth connection
none; no power source needed in personal devices
The sensors in the wrist device worn by the runner would most likely be using an internal battery as the power source.
What is the kind of power source?This is because the device needs to constantly track distance, speed, and number of steps while the runner is in motion, and an internal battery is a convenient and portable way to provide the necessary power.
Additionally, a Wi-Fi signal would not be necessary for the device to track distance, speed, and number of steps, as these metrics can be tracked locally on the device. Similarly, a Bluetooth connection would only be necessary if the runner wanted to connect the device to a smartphone or other device for additional functionality, such as music control or call notifications.
Therefore, the most likely power source for the sensors in the device would be an internal battery.
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