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A horizontal line on a distance-time graph means the object is
A. moving at a constant speed.
B. moving faster.
C. slowing down.
D. at res
**Weegy:** D. at rest, If an object is not moving, a horizontal line is shown on a distance-time graph. (More)

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Updated 8/23/2014 10:03:15 AM

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A horizontal line on a distance-time graph means the object is moving at a constant speed.

Added 8/23/2014 10:03:14 AM

This answer has been confirmed as correct, not copied, and helpful.

What is the most appropriate SI unit to express the speed of a cyclist in the last leg of a 10-km race?
A. km/s
B. km/h
C. mm/s
D. cm/h
**Weegy:** The most appropriate SI unit to express the speed of a cyclist in the last leg of a 10-km race is: km/h. (More)

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Expert Answered

Updated 6/28/2014 5:01:51 PM

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The rate at which velocity changes is called
A. speed.
B. vectors.
C. acceleration.
D. motion
**Weegy:** The rate at which velocity changes is called acceleration. (More)

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Updated 26 days ago|1/28/2017 5:01:34 AM

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A train approaching a crossing changes speed from 25 m/s to 10 m/s in 240 s. How can the train’s acceleration be described?
A. The train’s acceleration is positive.
B. The train is not accelerating.
C. The train will come to rest in 6 minutes.
D. The train’s acceleration is negative
**Weegy:** A train approaching a crossing changes speed from 25 m/s to 10 m/s in 240 s. The train’s acceleration is negative. (More)

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Expert Answered

Updated 6/28/2014 5:02:58 PM

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Speed is the ratio of the distance an object moves to
A. the amount of time needed to travel the distance.
B. the direction the object moves.
C. the displacement of the object.
D. the motion of the object
**Weegy:** The answer is D. the motion of the object
speed is the ratio of the distance an object moves per time unit (seconds,minutes hours)
Read more: (More)

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Asked 9/24/2012 11:35:31 AM

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