How much energy δ would be required to move the moon from its present orbit around earth to a location that is twice as far away? assume the moon’s orbit around earth is nearly circular and has a radius of 3.84×108 m. δ

Explanation:

As we know that total energy of satellite is given as

now we know that work done to change the orbit is equal to change in the total energy of Earth - Moon system

so we know that

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19