An idealized model of a river flowing around a rock considersa
circular rock of radius 1 in the river, which flows across
thexy-plane in the positive x0direction. the model begins with
thepotential funtion

where

show that the flow of v is tangent to the circle
meaning that now water crosses thecircle.

doing the gradient is easy but im not sure about proving that
theflow is tangent to the equation of the rock.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

With both problems. a.s.a.p directions on photo ^