What do sound waves , light waves , moving objects , and heat all have in common ?
- they all need a medium to travel
- they are all electromagnetic waves
-they are all mechanical waves
-they all transfer energy

Consider two regions of space containing a static electric field, region a and region b. in region a the equipotential lines are more closely spaced than those in region b. what can be said about the relative strength of the electric field in the two regions? a) the electric field in region a is stronger th