A half-liter bottle has a mass of 80g. it contains 500cm3 of liquid when full. the bottle of liquid when full. The bottle is filled with olive oil of density = 0.90g / cm3
a) calculate the mass in the bottle.
b) Calculate the mass of the full bottle

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c