What characterizes an elastic collision, but not an inelastic collision, in a closed system?
a. momentum is conserved
b. total energy is conserved
c. kinetic energy is conserved
d. no external net force acts
i think it is b.

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

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.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block