It is only a matter of time before a satellite comes back to the earth. As time goes by the satellite loses its speed which makes the gravitational pull stronger than the force pulling it away. This makes the satellite crash (坠落) down to the earth. 1.Which of the following uses of...
the satellite goes round and round. Everything that goes up has to come down. It is only a matter of time before a satellite comes back to the earth.As time goes by,the satellite loses its speed, which makes the force pulling it towards the earth stronger than t...