Which statement correctly distinguishes between all mechanical and all electromagnetic waves? electromagnetic waves carry energy perpendicular to wave motion; mechanical waves carry energy parallel to wave motion. mechanical waves carry energy perpendicular to wave motion; electromagnetic waves carry energy parallel to wave motion. electromagnetic waves carry energy through a medium; mechanical waves carry energy through media and space. mechanical waves carry energy through a medium; electromagnetic waves carry energy through media and space.

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.