An egg <em>(raw egg) </em>is naturally made up of the egg white and the egg yolk. It is a heterogenous mixture because <em>you can separate the egg white from the egg yolk.</em><u> This is commonly done in baking.</u> Its composition is <em>non-uniform.</em>
It becomes a "homogenous mixture" <em>once you beat the egg.</em> In this situation, you won't be able to separate the egg white from the egg yolk anymore.
If you coil the wire around and around, it will make the magnetic force stronger, but it will still be pretty weak. ... The strength of an electromagnet can be increased by increasing the number of loops of wire around the iron core and by increasing the current or voltage.