Abiologist used a microscope to measure two different kinds of cells. cell a was 12 micrometers in diameter, and cell b was 20 micrometers in diameter. she then took a photograph of the two cells. in the photograph, cell a measured 15 cm in diameter. what was the diameter of cell b in the photograph?

If you want to create an electrical current, which situation would produce a solution capable of this

)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.

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction