Answer:

Explanation:
Use the Kinematic Equation:

Plug in what is given and solve


Answer:
C
Explanation:
It has to travel 600 light years before we would be able to observe the explosion.
Answer:
The slope of a position-time graph represents an object’s velocity.
Explanation:
In a position-time graph, the values on the x-axis represent the time, while the values on the y-axis represent the position of the object.
Velocity is defined as the ratio between the displacement of an object and the time taken:

However, we can see that this definition corresponds to the slope of the curve in a position-time graph. In fact:
, the displacement, corresponds to the difference in position, so the difference between the values on the y-axis: 
, the time interval, corresponds to the difference in times, so the difference between the values on the x-axis: 
So, the velocity is

which corresponds to the slope of the curve.
Answer:
D. Because they are using space technology on a shirt so people can wear it on earth as well
Answer:
true
Explanation:
if there is no light it's different from when there is