Ascuba tank has a volume of 2000 cm3 . for very deep dives, the tank is filled with 50% (by volume) pure oxygen and 50% pure helium.

a.) how many molecules are there of each type in the tank if it is filled at 25 ∘c to a gauge pressure of 19 atm ?

express your answers using two significant figures. enter your answers numerically separated by a comma.

b.) what is the ratio of the average kinetic energies of the two types of molecule?

c.) what is the ratio of the rms speeds of the two types of molecule?

What type of light does this light bulb produce most (i. e. at what wavelength does the spectrum have maximum intensity)?

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

Element with 3protons and 5neutrons