A 66 kg snowboarder accelerates at 2 m/s? down the side of a mountain. How much force does this require?

What human activity increases beach erosion?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .