Why are the wheels on a roller coaster hot after a ride. (i know it’s due to friction but i need more of a detailed answer). also why could someone’s glasses fall off during a roller coaster ride (which law of motion). finally how do carousels accelerate?

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.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false