Iron oxide reacts with aluminum to give aluminum oxide and iron. what kind of chemical reaction is this?
a)combustion
b)decomposition
c)replacement
d)synthesis

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

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)

What causes the development of most clouds and precipitation in the atmosphere?