---
title: "Water flowing in a horizontal pipe speeds up as it goes from a section with a large diameter to a section with a small diameter. Which of the following can explain why the speed of the water increases?"
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url: "https://nerd-notes.com/ubq/79300/"
date_modified: "2025-03-04T08:04:23+00:00"
---

# Water flowing in a horizontal pipe speeds up as it goes from a section with a large diameter to a section with a small diameter. Which of the following can explain why the speed of the water increases?

Water flowing in a horizontal pipe speeds up as it goes from a section with a large diameter to a section with a small diameter. Which of the following can explain why the speed of the water increases?

- **A.** The gravitational potential energy of the water-Earth system increases.
- **B.** The gravitational potential energy of the water-Earth system decreases.
- **C.** Work is done because the water in the larger pipe has a higher pressure.
- **D.** Work is done because the water in the larger pipe has a lower pressure.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/79300/*