OCS 1006 Chapter : Sharks Live In The Ocean

Certain sharks can detect an electric field as weak as 1.00 μV/m. To grash how weak this field is, if you wanted to produce it between two parallel metal plates by connecting an ordinary 1.50 V AA battery across these plates, how far apart would the plates have to be?

How many drops of water are in the ocean on earth? (The ocean covers about of the earth's surface and is about deep on average). Earth's diameter is and assumes the radius of the drop-in ocean is . 

You've taken a summer job at a water park. In one stunt, a water skier is going to glide up the 2.0-m-high frictionless ramp shown in the figure, then sail over a 5.0-m-wide tank filled with hungry sharks. You will be driving the boat that pulls her to the ramp. She'll drop the tow rope at the base of the ramp just as you veer away.