4. How far apart are a proton and electron if they exert an attractive force of 3 N on one another?

For the force due to electromagnetism we use Coulomb’s inverse square law:

F=keq1q2r2

(where F is the electrostatic force, q1 & q2 are the two charges, r is the distance between them, and Coulomb’s Constant ke=14πϵ0=8.99×109Nm2C−2, where ϵ0 is the permittivity of free space)

r=keq1q2F−−−−−√

r=8.99×109Nm2C−2−1.60×10−19C×−1.60×10−19C1.0N−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−√

r=1.52×10−14m

Explanation:

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2