Yes, this is accurate. While "dark matter" might exist, it is still more of a theory, it is not yet defined properly. As far as we truthfully know, the entire universe is just matter and energy.
Note : Be careful with speed and velocity, even the formula is same that
![v = \frac{x}{t}](https://tex.z-dn.net/?f=v%20%3D%20%20%5Cfrac%7Bx%7D%7Bt%7D%20)
1. If we would like to find the velocity, we must calculate the distance from initial to final,
![x_{f} - x_{i} = (delta)x](https://tex.z-dn.net/?f=%20x_%7Bf%7D%20-%20%20x_%7Bi%7D%20%3D%20%28delta%29x)
,
2. If we would like to find the speed, we must calculate the total distance that travelled (
![x_{total}](https://tex.z-dn.net/?f=%20x_%7Btotal%7D%20)
.
So, in this question, because it return back to its initial point so (delta)x = 0, so average velocity is 0 m/s.
The answer to that question is C
Answer:
A) 1.5 V
B) 4.5 V
Explanation:
A) Batteries in parallel have the same voltage as an individual battery.
V = 1.5 V
B) Batteries in series have a voltage equal to the sum of the individual batteries.
V = 1.5 V + 1.5 V + 1.5 V
V = 4.5 V
Answer:
Refer to the attachment!~