Which of these can be considered a system?
a computer
a car
a bicycle pedal
a pencil
a coffeemaker

Which statement correctly describes the relationship between frequency and wavelength?

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)