[Q]: I read this background article the other day: If a solution has a higher concentration of hydronium ions than pure water, it has a pH lower than 7. A solution with a pH lower than 7 is called an acid . As the hydronium ion concentration increases, the pH value decreases. Therefore, the more acidic a solution is, the lower its pH value is. Did you ever taste vinegar? Like other acids, it tastes sour. Stronger acids can be harmful to organisms. For example, stomach acid would eat through the stomach if it were not lined with a layer of mucus. Strong acids can also damage materials, even hard materials such as glass. I am facing a new situation today: In his chemistry lab David is learning about acids. He took three solutions to identify them correctly, sample A, sample B, and sample C. Sample A is a strong acid; sample B is a weak acid; and sample C is not an acid. David needs to identify the content of each sample by learning about their attributes. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which sample would have pH lower than seven, sample A or sample C?
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[A]: sample A
input: Please answer the following: I read this background article the other day: Hepatitis viruses can develop into a chronic viral infection that leads to liver cancer. Infection by human T-lymphotropic virus can lead to tropical spastic paraparesis and adult T-cell leukaemia. Human papillomaviruses are an established cause of cancers of cervix, skin, anus, and penis. Within the Herpesviridae, Kaposi's sarcoma-associated herpesvirus causes Kaposi's sarcoma and body-cavity lymphoma, and EpsteinBarr virus causes Burkitt's lymphoma, Hodgkin's lymphoma, B lymphoproliferative disorder, and nasopharyngeal carcinoma. Merkel cell polyomavirus closely related to SV40 and mouse polyomaviruses that have been used as animal models for cancer viruses for over 50 years. I am facing a new situation today: Two brothers got sick and weren't feeling well. Strangely enough they found out they were infected with viruses. Tom was infected with human papillomavirus, while Chris was infected with hepatitis. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which brother was more at risk of developing penis cancer?
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output: Tom
Please answer this: I read this background article the other day: Sometimes muscles and tendons get injured when a person starts doing an activity before they have warmed up properly. A warm up is a slow increase in the intensity of a physical activity that prepares muscles for an activity. Warming up increases the blood flow to the muscles and increases the heart rate. Warmed-up muscles and tendons are less likely to get injured. For example, before running or playing soccer, a person might jog slowly to warm muscles and increase their heart rate. Even elite athletes need to warm up ( Figure below ). I am facing a new situation today: There was a soccer match between Red team and Blue team. Blue team got there early, warmed up properly and were ready for the game. Red team arrived late and almost skipped warming up entirely. Costly decision, as it turns out, because they lost. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which team didn't perform a slow increase in intensity of a physical activity before the match?
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Answer: Red
Problem: I read this background article the other day: We discussed earlier some basic principles about the behavior of gases called the kinetic-molecular theory. Among other things, this theory suggests that gas molecules are in constant motion, and the average speed of the individual gas particles is dependent upon temperature the higher the temperature, the faster the molecules move. It is not just gas particles that are in constant motion. The molecules and ions that make up liquids and solutions are also continually moving in nearly random directions. As a result, molecules and ions in a solution will collide with one another fairly frequently. As with gases, a temperature increase will produce an increase in the average particle speed. I am facing a new situation today: Hank put two pots of water on separate burners on a stove to prepare dinner for his party later tonight. Pot X is sitting on a burner that is turned on, but Pot Y is sitting on a burner that is off. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which pot's ions are moving slower?

A: Pot Y
Problem: Given the question: I read this background article the other day: Electrons can be removed from some objects using friction, simply by rubbing one substance against another substance. There are many examples of objects becoming charged by friction, including a rubber comb through hair, and a balloon on a sweater. In both these instances, the electrons move from the second object to the first, causing the first object to become negatively charged and the second one positively charged. Friction between the tires on a moving car and the road cause the tires to become charged, and wind causes friction between clouds and air which causes clouds to become charged and can result in tremendous bolts of lightning. I am facing a new situation today: Jan, a middle school student, is curious to learn more about friction so she grabs two random objects and rubs them together. After rubbing them together, object B has transferred some of its electrons to object A. After observing this she starts to wonder more about electrons and decides she will ask her teacher more about it tomorrow at school. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which item is negatively charged?
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The answer is:
object A
Problem: I read this background article the other day: Making these healthy lifestyle choices can also help prevent some types of cancer. In addition, you can lower the risk of cancer by avoiding carcinogens , which are substances that cause cancer. For example, you can reduce your risk of lung cancer by not smoking. You can reduce your risk of skin cancer by using sunscreen. How to choose a sunscreen that offers the most protection is explained below ( Figure below ). Some people think that tanning beds are a safe way to get a tan. This is a myth. Tanning beds expose the skin to UV radiation. Any exposure to UV radiation increases the risk of skin cancer. It doesn't matter whether the radiation comes from tanning lamps or the sun. I am facing a new situation today: Benny and Jerry were two Irish twins. They went to the doctor for their yearly exam. Benny found out he could get cancer because of his lifestyle so he decided to make healthy lifestyle choices from then on. Jerry continued smoking, spending lots of time in the sun, and eating junk-food. Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which brother lowered the risk of getting lung cancer by quitting smoking?

A:
Benny