What is the volume of a marble with a diameter of 3.0

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

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.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical