Which sentence describes energy flow through a natural (not manufactured) system?

An FM radio station broadcasts at 9.23 x 107 Hz. Given that the radio waves travel at 3.00 x 108 m/s, what is the wavelength of these waves?

What is the significance of Einstein's famous equation E = mc2? Energy is not related to mass. Mass can be destroyed. Energy can be destroyed. Mass and energy can convert to one another.

What do we call the combination of all food chains in a given ecosystem

Which shows a decrease in fluid pressure? A. A fan is turned from high speed to low speed. B. Oxygen is compressed as it is put into a pressurized tank. C. Water in a creek slows down as it enters a slow-moving river. D.

If an object moved in the same direction and at a constant speed for 4 hours, which of the following is true? a. the object's speed changed during the 4 hours b. the object; s velocity did not change c. the object accelerated during the 4 hours d.

Molecules at room temperature move freely. What happens to the molecules when heat is removed until it freezes? Molecules group together Molecules slow down and contract Molecules speed up and expand Molecules move freely

A spring is used in a lab. It is vibrated at different frequencies and the wavelength is recorded. Using the graph of the data, what is the relationship found between frequency and wavelength? A) Frequency and wavelength are inversely related.

How do you describe the frequency of waves perceived by the observer from the moment the source appears to the moment it disappears?

What causes the stars to appear to move across the night sky?

Two waves collide and the temporary combined waves that results is smaller that the original wave. which term describes this interaction? A. destructive interference B. standing wave formation C. diffraction D. constructive interference