Projectile Motion: A player kicks a soccer ball in a high arc toward the opponent's goal. At the highest point in its trajectory

A. both the velocity and the acceleration of the soccer ball are zero.
B. neither the ball's velocity nor its acceleration are zero.
C. the ball's acceleration is zero but its velocity is not zero.
D. the ball's acceleration points upward.
E. the ball's velocity points downward.


Answer: B

Physics & Space Science

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A) infrared, visible light, ultraviolet, X-rays, gamma rays, radio
B) radio, infrared, visible light, ultraviolet, X-rays, gamma rays
C) visible light, infrared, X-rays, ultraviolet, gamma rays, radio
D) gamma rays, X-rays, ultraviolet, visible light, infrared, radio
E) gamma rays, X-rays, visible light, ultraviolet, infrared, radio

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What will be an ideal response?

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The cosmic background radiation appears compatible with a blackbody source at what temperature?

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A proton and an electron are released from rest, with only the electrostatic force acting. Which of the following statements must be true about them as they move toward each other? (There could be more than one correct choice.)

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