un satélite de 500 kg describe una orbita circular a 100 km de la superficie lunar. calcula la rapidez y su periodo de revolucion

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Could we see a galaxy that is 20 billion light-years away?