Ineed with science homework!
which of these is an example of work being done on an object?
select one:
a. holding a heavy piece of wood at a construction site
b. trying to push a car that doesn't move out of deep snow
c. holding a door shut on a windy day so it doesn't blow open
d. pushing a child on a swing

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.