Asingly-charged ion enters a velocity selector that has a 0.18-t magnetic field perpendicular to an electric field of 1.6 kv/m, with both fields perpendicular to the velocity of the ion. the same magnetic field is then used to deflect the ion into a circular path of radius 12.5 cm. what velocity was selected by the velocity selector?

a) 8.9km/s b) 4.05 x 10^-25 kg

Explanation:

a)

To find the velocity, 

V = E/B plug in the numbers we get

V = 1.6kV/m / 0.18 T = 8.9 km/s 



b)

To find the ion mass, 

m = erB^2/E = 0.125 m x 1.6x10^-19 x (0.18)^2 / ( 1.6 x 10 ^ 3 V/m ) = 4.05 x 10 ^ -25 kg

no

sodium is solid at rt

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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