Dear Earth Care,I am doing a project on behalf of ① my school about global warming. Sometimes I feel that individuals can have little effect on③ such huge environmental problems. However, I still think people should advocate improvements in the way we use energy today. As I'm not sure ...
Microwave ovens convert electricity into longer-wavelength electromagnetic waves, calledmicrowaves, which are emitted inside a tightly sealed metal box. Theoretically, these waves bounce back from the wall and should not bypass the wall. Although it is still not quite clear how the heat is distribute...
Today, there's a greater emphasis on diverse cuisines, fusion dishes, and the use of modern kitchen appliances. The availability of a wide range of ingredients from around the world has also influenced cooking styles. 你身边喜欢烹饪的人(他是谁,喜欢做什么,给谁做,为什么喜欢做)Who does like to...
Artwork: Kettles use a lot of energy to boil water, but do the job quickly (in about 2.5 minutes) because they work at high power. With the same amount of energy, you could power a microwave oven for about 8 minutes, a laptop computer for an hour and 20 minutes, or an energy-...
The answer, based on experiments over several years by several scientists in several places, proved to be microwaves, whether emitted by “directional radio antennas” [5, page 353] or by “powerful radar stations” [5, page 354]. The negative effects of wireless radiation in the microwave sp...
Wolke, Emeritus Professor of Chemistry at the University of Pittsburgh, whips us through answers to all kinds of questions, from how microwaves work to why pasteurization preserves food. Chapter 1 "Sweet Talk", covers a little bit of chocolate science, including why it melts in the mouth (...
There is a legend behind the use of microwaves for cooking. Percy Le Spencer was employed by the Raytheon Company during the World War Ⅱ.One day on 1942 he was working with magnetrons(电磁管), which can produce microwaves.When he pulled a candy bar from his pocket, it was a melted me...