Assuming that voltage remains constant, what happens to the current in a filament if it is replaced by a thinner wire?
a. the current increases.
b. the current decreases.
c. the current is not affected by a change in filament thickness.
d. the current alternates between high and low values.

Ahole in the ground in the shape of an inverted cone is 14 meters deep and has radius at the top of 11 meters. the cone is filled to the top with sawdust. the density of the sawdust depends upon the depth, x, following the formula ρ ( x ) = 2.5 + 1.2 e − 0.7 x kg/m3. find the total mass of sawdust in the conical hole.