If an object has a velocity of 8 m/s and a momentum of 40 kg. m/s, what is the
mass of the object

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

In 2002, the rare earth elements mine in mountain pass, california was closed because