Answer:
B. 
.
Explanation:
The vehicle is travelling eastwards when its velocity is positive and westwards when velocity is negative. According to the graph, 
for . Hence, correct answer is B.
A model would be useful for a scientist because it allows prediction of what may happen without doing really the experiments. It saves time and money for the scientist. Also, it helps scientists in communicating their <span>scientific investigation to people.</span>
I believe that the answer is chemical energy.
Answer:
B. Movement of electrons
Hope this helps!! may I have brainliest? :)
Answer:
Transferring
Explanation:
It's just the transferring of heat
