As demands for electricity push the limits of existing electric-power-generating plants in the United States, when is it most likely that a brown-out or blackout will disrupt electricity to your home computer?

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.