Answer:
There are no answer chooses to this question
Explanation:
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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Number 4 is : a light hour is a measure of time in space used to calculate the length of time between one object to another and one light hour equals 1.079 × 109 kilometers or 1.079e+9
Answer:
These acts of attraction and repulsion are called “magnetism”, and the magnetic space around a magnet is called the “magnetic field”
Explanation:
You want to do it all by yourself ? Nothing to it !
Take a piece of rope that's maybe 12 to 18 inches long. Take one end
of the rope in each hand, raise your hands up in front of you, and make
like you're trying to stretch the rope. You'll automatically make the forces
of your hands equal and opposite, so that the rope just stays there in front
of you and doesn't move.