Answer:
3610 m/s^2
Step-by-step explanation:
The centripetal acceleration of the tip of the test tube is given by:
![a=(v^2)/(r)](https://img.qammunity.org/2019/formulas/mathematics/college/w7xwjhzesdpcmpcd8jhh2hpdpgh6phi268.png)
where
v = 19.0 m/s is the velocity of the tip
r = 10.0 cm = 0.1 m is the radius of the circular trajectory of the tip
Substituting the numbers into the formula, we find
![a=((19.0 m/s)^2)/(0.1 m)=3610 m/s^2](https://img.qammunity.org/2019/formulas/physics/high-school/b9evbgvvjvnm900mqemj63ybbnszmuf2u3.png)