In a Millikan’s oil drop experiment, a drop is observed to fall with a terminal speed 1.4 mm/s in the absence of electric field. When a vertical electric field of 4.9x105
V/m is applied, the droplet is observed to continue to move downward at a lower
speed 1.21 mm/s. Calculate the charge on the drop. ( Density of oil = 750 kg/m3
,
viscosity of air = 1.81x 10 -5 kg/ms and density of air = 1.29 kg/m3
)

the inner core.

good luck: )

klicker

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

not too sure thinking all accelerations are pointed down