Which new material that is corrosion resistant can replace iron and be used in construction or development of other structures?

You have a number of choices. The simplest would be iron with a corrosion resistant coating such as paint. and by corrosion resistant I’m assuming you mean oxidation resistant. Otherwise you have stainless steel or aluminum. Depending on your requirements you also have plastics and resins, but typically these get expensive and may not have …

Why can only 2/3rd’s of a plastic be recycled?

As I understand things you have generally two categories of plastics. Thermosets and thermoplastics. Thermoplastics lend themselves to be recycled, thermosets may or may not lend themselves to recycling. And of course, as each has its sets of material properties many things must be constructed of non-recyclable plastics in order to work properly.

What happens if you mix up kinetic energy with potential energy?

Let’s start with definitions. Potential energy is the total energy that could be used. Works well for gravity and chemical energy. I’m going to assume you’re working with gravity examples. Kinetic energy is the total energy you are using right now or up to this point with in the confines of your example. Imagine a …

Do structures built in stones last more than 500 years?

The stones will definitely last 500 years. Whether the structure will last in an identifiable form would depend greatly on how it was put together, and within the environment it was placed. But if you assume the persons constructing the structure knew what they were doing, then most likely the majority, if the the whole …