The centripetal force is provided by the engine of the satellite C. The centripetal force is zero because the satellite is in a state of equilibrium D. The centripetal force is provided by the air resistance 相关知识点: 试题来源: 解析 A。解析:在卫星绕地球做圆周运动时,根据圆周运动的力学...
Question: A satellite moves around the earth in a circular orbit at a height of 6,000km. Find its speed. a. 6km/s b. 4km/s c. 20km/s d. 5km/s Speed of a Satellite: A satellite revolves around the earth in a circular or...
试题来源: 解析 A。卫星能在地球轨道上运行是因为重力。重力提供向心力,使卫星保持在轨道上。选项 B“magnetism”磁力不是卫星在轨道上运行的主要原因。选项 C“electricity”电与卫星在轨道上运行无关。选项 D“friction”摩擦力在太空环境中很小,不是卫星在轨道上运行的主要原因。
A. elliptical B. triangular C. rectangular D. circular 相关知识点: 试题来源: 解析 D。解析:circular表示圆形的,卫星一般被发射到绕地球的圆形轨道上。elliptical表示椭圆的;triangular表示三角形的;rectangular表示矩形的,都不符合卫星轨道的常规形状。反馈...
12 A satellite travels just above the Moon's surface in a circular orbit. The acceleration at the Moon's surface due to gravity is and the Moon's radius is , where g is the acceleration at the Earth's surface due to gravity and R is the radius of the Earth.If a satellite, travelli...
After the satellite has reached the final altitude, another rocket engine fires and gives the satellite a circular orbit. All rocket-engine burns occur at a precise moment and last for a precise amount of time so that the satellite achieves its proper position in space. In 1990 the United ...
3 A satellite orbits the Moon in a circular orbit at constant speed.(a)State the name of the force acting on the satellite.gravitationa. force/.weight.[1](b)(i) State the meaning of the term work.work =force Xdisplacemen in the directio of the force[1](ii) Explain why no work ...
objecttravellinginorbitroundanotherobjectinspace( )an;an;/an;an;thethe;an;thean;the;/ 相关知识点: 试题来源: 解析 A,考查冠词的用法,第一个空和第二个空表示类别,object"物体",orbit"轨道"都是可数名词,并都以元音音素开头,故前使用不定冠词an;第三个空考查固定搭配in space"在太空中",故答案为...
A meteorological satellite in a polar orbit passes over the poles of the Earth ___. A. once a day B. twice a day C. every other day D. once a week 相关知识点: 试题来源: 解析 B。解析:本题考查气象卫星在极轨道运行的特点。在极轨道运行的气象卫星每天会经过地球两极两次。once a day表示...
circular orbit trajectoriesenvironmentthermodynamicselectromagnetic propertiesmeteoritescosmic rayssolar spectrumterrestrial magnetismmagnetic fieldsThe current literature is reviewed and the natural environment at about 6.6 earth radii (from the center of the earth) is defined in terms of the thermodynamic ...