Water Flowing Through a Pipe Suddenly Comes to a Section

question 10

Multiple Choice

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value. If the speed of the water in the larger section of the pipe was 36m/s, what is its speed in this smaller section?

• A) 49 m/s
• B) 42 m/s
• C) 31 m/s
• D) 27 m/s

---

Definitions:

Variances

Measures of the dispersion of a set of data points around their mean value, indicating how spread out the data points are.

E(XY)

The anticipated outcome of multiplying two stochastic variables together, showing how their variances are interconnected.

COV(X,Y)

A measure of the degree to which two variables X and Y move together, indicating the strength and direction of their linear relationship.

Marginal Probability

The probability of an occurrence of a single event without consideration of any other events.