Block a slides down a ramp whose slope is 45°. an identical block b slides down a ramp whose slope is 60°. both blocks start at a height of 2 meters. compare the kinetic energies (ke) of the blocks just before they reach the bottom, assuming there is no friction.
a) they are the same
b) block a's pe is greater than block b's pe
c) block b's pe is greater than block a's pe
d) the actual masses must be known in order to figure this out

Two things that biomedical has invented or innovated

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

Write a balanced equation showing the formation of copper (ii) nitrite from its elements