A proton is at the origin and an electron is at the point x = 0.40 nm , y = 0.36 nm . Find the electric force on the proton.

The metric unit of electrical power is the watt volt ampere ohm

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)