2. You leave your house going east and ride your bike 2 miles to school. You were supposed to stop and pick up
your friend, so you ride west 1 mile to your friends house. It
takes you 0.5 hours to complete your trip. What is your
velocity?

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

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