How fast does a 50 kg rock need to me moving to have 900 J of kinetic Energy

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

The slope of a velocity time graph over any interval of time gives the during that interval

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer