A student has a short spring. He is required to investigate how the length of the spring changes as the load stretching it increases. Describe the experimental procedure he should follow, stating the equipment he should use and the measurements he should make

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

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.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?