A father has brown hair (B), but the offspring have red hair (a recessive trait), like their mother (b). How is this possible?

yes it is possible

Explanation:it is possible because when you add both of them it becomes red

the mother has bb (or red) hair.

Explanation:

The mother is red headed. So, a Bb brown haired father and a bb red headed mom gave their child bb (recessive) traits. When shown in a punnet square, bb is an option.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

this is a good question! i'll do some research and come back when i have the answer!