Who has been snow machining? It's so fun!!! :) i live in Alaska and go snow machining every year

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.

The two required components for a generator

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?