Acomet is expected to pass by the earth. francis wants to see as much detail of the event as he can.

which technology allows him to view the comet?

a rover
a scanning electron microscope
a scanning tunneling microscope
a telescope

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.

Reactants are mean lol