A satellite is orbiting the Earth. What force keeps it in orbit? A. Frictional force B. Magnetic force C. Gravitational force D. Nuclear force 相关知识点: 试题来源: 解析 C。解析:卫星绕地球运行是因为地球对卫星的万有引力提供了向心力,使其能够在轨道上运行。A选项,太空中卫星几乎不受摩擦...
A satellite is orbiting around the earth in a circular orbit of radius r. A particle of mass m is projected from the satellite in a forward direction with a velocity v=2/3 times the orbital velocity (this velocity is given w.r.t. earth). During subsequent motion of the particle, its...
The satellite of mass m is orbiting around the earth in a circular orbit with a velocity v.What will be its total energy ? View Solution Two satellites of masses M and 4M are orbiting the earth in a circular orbit of radius r. Their frequencies of revolution are in the ratio of View...
Earth’s gravity pulls everything toward the center of the planet. To stay in the earth’s orbit, the speed of a satellite must adjust to the tiniest changes in the pull of gravity.(人造卫星利用重力保持在轨道上。地球的引力把所有东西都拉向地球的中心。为了保持在地球轨道上运行,卫星的速度必须...
David FrancisForeign Policy
ountis around the globe arespendingbillions ofdollars and lots of time onvariousspace missions, whetherto Mars or other planets muchfurther away. Some people arguethat we should stop wastingtime and money exploring space.Instead, we should feed theNASA satellite image ofworld's poor and find ...
Orbit is when an object orbits around another object in space, such as satellites orbits around the earth. This is achieved by moving fast enough so that instead of falling back to earth, it falls around the earth.Answer and Explanation: ...
Peridic-time of satellite revolving around the earth is (ρ density of earth) . View Solution Assertion: The artifical satellite does not have any fuel but even then it remains orbiting around the earth. Reason: The necessary centripetal force required to move the satellite in an ·orbit aro...
Today, whether a satellite orbiting Earth or a smartphone in your pocket, all of these devices boil down to changing light into numbers representing the brightness of the sky at each pixel (像素). Some stars in the sky slightly change their brightness over time. With digital technology, the ...
The value of escape velocity on a certain planet is 2 km/s. Then the value of orbital speed for a satellite orbiting close to its surface is: View Solution A satellite is revolving around the earth. Ratio of its orbital speed and escape speed will be. ...