Maria took a walk to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero? a. 0 hrs b. it was never 0 c. at 0 hrs then 2hrs d. at 0.75 to 1.25 hr

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space