Q:

I am doing a science project that includes baking muffins each with a different type of flour; white, wheat and rice. Problem: How do I measure the density of a muffin? is better to use the method of putting in water and measuring it from a measuring cup or cutting in a cube and measuring it from there?

- chantelle king (age 13)

canada

- chantelle king (age 13)

canada

A:

As you probably know, the density is given by the ratio of the mass divided by the volume. The mass is easy, plop it onto a scale and measure its weight. The issue is what's the volume? There are two classic ways, 1. Measure it if the volume is easy to calculate, for example a sphere or a cube or: 2. Use the Archimedes method where you measure the amount of water displaced when you dunk it in water. I recommend #1 since method #2 makes the muffin soggy and not edible after the experiment.

So your idea of cutting a cube out the muffin is the correct solution. If you are really curious and willing to sacrifice a muffin, you might try the other method just to see what happens.

LeeH

So your idea of cutting a cube out the muffin is the correct solution. If you are really curious and willing to sacrifice a muffin, you might try the other method just to see what happens.

LeeH

*(published on 02/06/2013)*