“神舟七号”考题早知道(国外英文资料).doc

“神舟七号”考题早知道(国外英文资料) Shenzhou seven exam early to know Third on the Shenzhou spacecraft to grasp the focus of senior high school entrance examination physics Beijing time 21:10 on September 25, 2008, carrying the Shenzhou seven spacecraft Long March 2 F carrier rocket successfully launched. The 27 day at 16:41 to 17, astronaut Zhai Zhigang has taken the first step in space, started the first spacewalk Chinese, set up a new era in the field of aerospace China. 28, about 17:30 the spacecraft successfully landed in Inner Mongolia grassland in Siziwangqi. This is another major breakthrough in Chinas aerospace industry. The manned spacecraft involves considerable physical knowledge, in order to examine students attention to life, pay attention to the development of science and technology consciousness, will become a hot issue in the 2009 senior high school entrance examination of physics. The knowledge of the physics of a manned spacecraft in Engineering 1. acoustics: (1) no air in space, sound can not travel (not vacuum transmission), astronauts and ground contact is realized by electromagnetic wave. (2) there is air in the returns cabin, air transmission, astronauts can normal conversation, can hear the working noise, so go to bed to wear special earplugs, this is noise reduction through way to reduce noise in the ear. 2. optical: In space to see the earth is a blue planet, this is because the earth is not the same as the moon light, sunlight reflected the effect of the formation of. Look at the sun in space, you can only see a particularly bright photosphere dark space, there is a bleak, this is because the space there is no air substances such as light scattering. In order to shoot in the dark and clear back to the ground in the process, using infrared photography, because the temperature is high and the returns cabin air friction, the infrared light is obvious. 3. heat: (1) energy conversion: Rocket ascent, rocket fuel chemical energy into mechanical energy and heat