Answer:
A
Explanation:if the things have the same charge they will repel makeing the ball move away form its positively charged guy = that the coil gun works.
The model is based on hypothesis to get an initial idea for analyzing a complex problem. Hence, the validity of a model is limited and may not be valid universally. On the other hand, theories and laws are confirmed hypothesis which are universally valid. These are formulated after repeated testings. theories are more explanatory.
Answer:
For your kind information, read the question thoroughly!
The bottom is the container part and not the liquid.
I hope it will be useful.
The answer is B. helium-filled balloon, since sound travels the slowest through gases.
