A pipe with diameter 3 cm has water moving at 0.5 m/s. If the pipe diameter reduces to 1 cm, what is the new speed?
Q1. A pipe with diameter 3 cm has water moving at 0.5 m/s. If the pipe diameter reduces to 1 cm, what is the new speed?
Answer: 4.5 m/s
Explanation: Area is proportional to the square of the diameter. If diameter is 1/3, area is 1/9, so speed must be 9 times higher (9 * 0.5 = 4.5).