Check my work on this one question
a worker uses a cart to move a load of bricks a distance of 10 m across a parking lot. if he pushes the cart with a constant force of 209 n, what amount of work does he do? show your work.
209*10=2090, but what units do i use for work?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.