Isostasy is the state of gravitational equilibrium between earths crust and mantle such that the crust “floats” at an elevation that depends on it’s thickness and density. put the following in order from least dense to most dense: continental crust, oceanic crust , mantle

Explain why electric current cannot exist if a current doesn't have a voltage source.

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical