An electric power station that operates at 30 kv and uses a 20: 1 step-up ideal transformer is producing 330 mw (mega-watt) of power that is to be sent to a big city which is located 260 km away with only 2.5% loss. each of the two wires are made of copper (resistivity = 1.72×10^−8 ω.m). what is the diameter of the wires?

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

What are two different ways you could find the value of a? explain these methods.