A snowball that will be used to build a snowman is at the top of a only hill. If the potential energy of the snowball is 520 J and the mass of the snowball is 2.2 kg,
what is the height of the hill?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

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 statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.