A. red, is the correct answer. A red filter only lets red light through, whether white or red light passes through it.
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I think the answer is c.<span>holding a tray in the cafeteria line</span>
The ball is accelerating
Explanation:
On a distance-time graph, the slope of the graph represents the speed of the object represented.
Let's therefore calculate the slope (so, the speed of the ball) in the two intervals given.
In the first second, we have:

So the average speed is

In the next second, we have:

So the average speed is

We notice that the speed of the ball has increased from 20 m/s in the first second to 40 m/s in the next second: this means that the speed of the ball is increasing, and therefore, the ball is accelerating.
Learn more about acceleration:
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Answer:
his displacement is 5m
Explanation:
A is the stage at which a man starts walking. He's walking 4 m north, i.e. AB, then going 3 m east, i.e. BC. The displacement is the connecting straight line between the original and the final position. The displacement is thus the AC hypotenuse of the right-angle triangle. By applying the theorem of hypotenuse, we get
⇒displacement=16+9−−−−−√=25−−√=5m