The image shown is an illustration of Kepler's second law.

Which conclusion is best supported by the image?

O The gravitational force at W is less than the
gravitational force at Y.

The time needed to travel from W to X is the same as
the time needed to travel from Y to Z.

O The gravitational force at W is the same as the
gravitational force at Y.

The time needed to travel from W to X is greater than
the time needed to travel from Y to Z.

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Explain why electric current cannot exist if a current doesn't have a voltage source.

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length