Huan made a chart to study for an exam about radio waves.

Which headings best complete the chart?

X: Phase

Y: Pulse

X: Pulse

Y: Phase

X: AM

Y: FM

X: FM

Y: AM

the area between the graph and the t axis

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blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.