Their chemicals and their reactions, hope I helped
A. nucleus
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I think the answer is B because juice has a higher density than water
Answer:

Explanation:
<u>Average Speed
</u>
If an object travels a distance d in a time t regardless of the direction, the average speed is the quotient of the distance over the time:

It's known a person runs d=15 kilometers in t=2 hours, thus his/her average speed is:

Calculating:

Answer:
by doing the test over and over again until you get the right results
Explanation: