Reply #2: Johnny what is the rate of reduction of the surface area of the ice coating the silo? Assume it's [View All]

[John N Morgan]

40 deg F. It's an everyday kind of problem, I just don't see it being asked.

First, you have to have an understanding of the fundamentals then you can apply them to a situation. It seems the "improvement" is gained from the prolonged reinforcement of established constructs, not from new material.

Like first, you have to know the addition operation exists then you can deal with sums of groups, etc.

But when you get to derivatives and rates of change ... there's some classroom work involved.

Besides, good old classroom/book instruction produced America's greatest engineering advancement.

Project Based, pfffft! Do they mean, let's learn how to mine coal. Betty pick up that shovel and fill that hopper car. How many tons of coal is that? 16? hmmmm