] 100이 기준이야! 어수동 : %는 무엇을 의미하는 기호인가요? 수달 : %는 ‘퍼센트(percent)’라고 읽어요. 백분율을 나타내는 데 쓰는 기호이지요. 어수동 : 백분율이 뭔데요? 수달 : 백분율이란 기준이 되는 양을 100으로 할 때 비교하는 양의 비율을 말해요. 제가 충전이 99%만큼 됐다고 말한 건, ...
He added that the school is ideal for meeting people from other countries and for the family-like atmosphere. Thirty percent of UST research students are foreign nationals from more than 40 countries, including Vietnam, India, and Pakistan.좋은 분위기 덕분인지 그는 최근 큰 연구 성과를 거뒀다. 에너지 효율을 높이고 배기가스인 질소산화물의 배출량을 ...
shows that a digital infrared camera can read the digits of a customer’s PIN number on the keypad more than 80 percent of the time if used immediately. And if the camera is used a minute later, says Keaton Mowery, a doctoral student in computer science at UCSD, it can still detect the correct digits about half the time. The research, which Mowery conducted with fellow student Sarah ...
miles tall. You would be up in the vacuum of space, but you would not be weightless at all. You′d only weigh fifteen percent less than you do on the ground. Yet spacecraft can orbit at the height of your ladder! While you′re up there, you might see the Space Shuttle zip right by you. The people inside it would seem as weightless as always. Yet on your ladder, you′d feel nearly normal ...
from diseases carried by rodents or by the insects that live on them. It's estimated that in the 14th century, 75 percent of the population of Asia and Europe died of plague, a disease caused by the bacterium Pasturella pestis, carried by rat fleas.In the past year about 45 Americans, many of them Navajo Indians, were afflicted with a mysterious flu-like disease. So far, 27 people have died. ...
it is a few feet away on the New York City streets. According to forest meteorologist Gordon Heisler, homes save 10 percent in cooling costs when surrounded by trees. Heisler and others are part of the ongoing Chicago Urban Forest Climate Project, studying the effect of urban trees on climate, energy use and air quality.Scientists all over Earth have been coming up with almost fantastic ways ...
floor has been accurately mapped. Oceanographer Haraldur Sigurdsson, of the University of Rhode Island, says that 90 percent of all volcanic activity is on the ocean floor.Erupting underwater volcanoes could alter the climate by warming up water, changing how ocean currents move. In the Pacific this may be the cause of the weather and water current change known as El Nino, which ruins South ...
blue ice.Antarctica, the fifth largest, is also three times higher than any other continent. Its ice represents 70 percent of the world's fresh water, yet its atmosphere is as dry as a desert. And, of course, it is cold - the interior of Antarctica is the coldest place on Earth. But the extreme cold and dryness make it THE place where equipment - and people - can be tested prior to possible ...
not at all the same because it is much harder to detect early. Ovarian cancer kills 12,500 women every year, for in 80 percent of patients, the cancer has already spread by the time it's found. The germ-cell variety of ovarian cancer may attack young women, while epithelial and stromal cell ovarian cancers attack older women as well.In older women the disease is even more likely to be far ...
spectrum of light is invisible to us, even as it gives us sunburns and skin cancer. We also can't see infrared, the 60 percent of light at the other end of the spectrum. The sun, however, emits not only light but X-rays, charged particles and neutrinos.Charged particles zoom out of the sun in what's called the solar wind, reaching Earth in three and a half days. During intense solar flare ...