Have you ever walked outside thinking it was one temperature but quickly discovered it felt colder? That is because of the "wind chill" effect. Wind chill is how cold people and animals feel when they are outside, not the actual temperature on the thermometer . It is based on how quickly your body loses heat when it is exposed to wind and cold. When the wind is strong, your body quickly loses heat, making the temperature of your skin drop. When scientists first started calculating wind chill, they used research conducted in 1945 by explorers to Antarctica who measured how quickly water froze outside. But water freezes faster than exposed skin, so the wind chill index based on that data wasn't accurate. In 2001, the US government began to measure wind chill more precisely by testing how quickly people's skin froze. Twelve volunteers were placed in a chilled wind tunnel. Equipment was stuck to their faces to measure the heat flow from their cheeks, forehead, nose and chin while they walked three miles per hour on a treadmill . The experiment revealed how quickly exposed skin can be damaged, particularly unprotected areas like your fingers, toes, the tip of your nose and your ear lobes. In fact, 40 percent of your body heat can be lost through your head! Signs you might have frostbite are when the skin turns white or pale and you lose feeling in that area. The information collected from the volunteers helped scientists work out the math to compute wind chill. It involves wind speed and air temperature. If, for example, the temperature outside is zero degrees Fahrenheit and the wind is blowing at 15 miles per hour, the wind chill is calculated at 19 degrees below zero. At that wind chill temperature, exposed skin can freeze in 30 minutes. You can find a calculation table at www.nws.noaa.gov/om/windchill/index.shtml. Experts advise in cold weather that you wear loose-fitting, lightweight, warm clothing, worn on top of each other. Air caught between the clothes will keep you warm. The best cold-weather coats have... According to the text, wind chill _ . A) means how fast exposed skin freezes B) doesn't affect your head as much as other body parts C) changes according to the temperature on the thermometer D) changes from person to person depending on their health
A
(Question)
It's time to remind myself what I love about life here in California,USA, to remember what I desperately miss when I go home. Real radio In the USA there are so many radio stations that those iPod tuner things don't work at all. _ . It took me a while to discover the USA's many public radio stations, which don't broadcast any advertisements. KCRW is my favorites station, for its blend of indie music and current affairs. But I also listen to KJAZZ and KPCC. But before you feel jealous -- it's all online. My favorites: American life Snap Judgement and Henry Rollins live every Saturday night. Take listen online for free News? Well, there's not a lot of news from South Africa, and when it is, it's bad and full of fear, so I ignore it. But I care about any place I live in, and that includes the USA. And on public radio, the USA is covered in depth, from the perspective of individual stories rather than statistics. The festivals I'm jealously watching tweets and Facebook boasts and reviews from SXSW -- seems like half the people I used to work with in South Africa are there,meeting Grumpy Cat and watching bands they've always wanted to see live. It's great to know that these 1000s of festivals are so close, and that one day,if film school schedule ever allows me to leave campus for more than a few days, I can go to one or two of them. I have already exchanged my much loved Ford Mustang for a bigger, less sexy car -- a car spacious enough to sleep in -- so that next year I can be there, not just dream of it. The famous people When I go back to SA, I'm often asked if I've spotted any famous people. It's awkward for me. I feel the the same way about it as I feel when an American asks me if there are lions in the streets. Except yes, I have. No,not lions. I have met some famous people. I chatted to RJ Mitte from Breaking Bad outside a dub in West Hollywood. Many of my professors are famous directors. The problem is, once you meet these famous people, they're just people, FFS. This feels disappointing at first, like... The author thinks the famous people in the USA _ . A) are just Like lions B) are well-known but ordinary C) are disappointing D) are inspiring
(Answer)
B
Ques: About a year ago, I went to stay at a Detroit hotel. I didn't want to carry too much money with me, so I asked the desk clerk to put a one-hundred-dollar bill in the safe for me. The next morning, however, the clerk said he knew nothing about my money. I didn't have any proof that I had given the man the money. There was nothing I could do but go to the nearest lawyer. The lawyer advised me to return to the hotel with him and give another one-hundred-dollar bill to the clerk. This I did. An hour later, I went back to the desk alone and asked for my money. Since I had the lawyer as an eyewitness to the second one-hundred-dollar bill, the clerk could not say he knew nothing about it. Another hour later, I put the second part of the lawyer's plan into action. This time both the lawyer and I went to the hotel. I asked for the one-hundred-dollar bill once again, and when the clerk insisted he had already given it to me, I denied it. The lawyer said to him, "I saw this gentleman give you a hundred dollars. If you don't hand it over immediately, I'll be forced to call the police." The clerk realized he had been tricked, so he gave me back the first one-hundred-dollar bill. "I don't know how to thank you enough for getting my money back," I said to the lawyer. And what do you suppose he answered me? He said, "Oh, don't thank me. That will be a hundred dollars, please." The hotel clerk at last returned the first one-hundred-dollar bill to the man because _ . A) he knew the lawyer's plan very well B) he found the lawyer tricking him C) he wanted no trouble with the police D) he wanted to give the man a surprise
Ans: C
Question: At a hospital in Illinois, doctors and patients dress up as clowns and put on little plays to make each other laugh.A hospital in prefix = st1 /New Yorkputs funny books in its library for patients. Can laughter make sick people feel better? Yes, say scientists.Laughter is no laughing matter.Scientists think laughter can help sick people feel less pain and get better more quickly.This new idea is being taught to students in medical school. Doctors have known for a long time that stress and loneliness, lack of friends and family can harm sick people.Now they are learning that laughter can help put people on the road to recovery. Scientists have discovered that laughter gives the body a healthy form of exercise.Also, laughter sets free a chemical in the body that speeds healing. Some doctors are using this new research to make their patients feel like having a million dollars.At a California hospital, people who have cancer tell each other funny stories and perform with a famous actor who has had cancer surgery . Laughter can be good medicine. Some hospitals are trying to make patients laugh because _ . A) it makes patients feel better B) patients will be satisfied with them C) patients will be younger D) it can cure all the illnesses
Answer:
A