What might happen if transformers didn’t exist?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?

Ahuge (essentially infinite) horizontal nonconducting sheet 10.0 cm thick has charge uniformly spread over both faces. the upper face carries +95.0 nc/m2 while the lower face carries -25.0 nc/ m2. what is the magnitude of the electric field at a point within the sheet 2.00 cm below the upper face? (ε0 = 8.85 × 10-12 c2/n · m2)

When solid surfaces slide over each other the kind of friction that occurs is called friction