<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
You are viewing an older version of this Concept. Go to the latest version.

# Pressure in Fluids

## The amount of force acting on a given area. Pressure = Force/Area

Estimated3 minsto complete
%
Progress
Practice Pressure in Fluids

MEMORY METER
This indicates how strong in your memory this concept is
Progress
Estimated3 minsto complete
%
Shot from a Cannon

### Shot from a Cannon

Credit: terren in virginia
Source: http://www.flickr.com/photos/8136496@N05/4289510096/

These rainbows O’s swimming in a bowl of milk are a familiar morning sight. They are a popular breakfast cereal. You may eat them yourself. If so, you’re far from alone.

#### Amazing but True!

• Amazingly, Americans eat nearly three billion boxes of breakfast cereal every year! But few people know how the cereals are made.
• Credit: Rich Mitchell
Source: http://www.flickr.com/photos/mtchlra/12199275603/

The cereal section is often one of the larger sections at a supermarket [Figure2]

• What’s the science behind those sweet and colorful puffs and flakes? Believe it not, cereals used to be shot from an actual cannon!
• You can learn how by going on a virtual field trip at the following Web site. You’ll visit the very first exhibit of the fledgling New York Museum of Food and Drink. You’ll see puffed rice exploding from a cannon in slow motion. You can also view photos from the exhibit and read all about it here: http://www.popsci.com/technology/article/2013-06/exclusive-video-exploding-rice-puffs

#### Show What You Know

1. Describe how puffed cereals were originally made.
2. Popcorn is a good model for how breakfast cereals are made. Explain why.
3. A well-known breakfast cereal makes distinctive sounds when milk is poured over it. It “snaps, crackles, and pops.” Explain why.
4. The way breakfast cereals are made shows how pressure affects changes of state. Describe how pressure affects the temperature at which a liquid changes to a gas.
5. What explains the relationship in question 4 at the molecular level?

### Notes/Highlights Having trouble? Report an issue.

Color Highlighted Text Notes