First one: the definition of acceleration. Homer says:
"A change in the product of Mass times Velocity"
Fact:
Mass times velocity = momentum
Change in mass times velocity = change in momentum = impulse
Base units for acceleration is meters per seconds squared, whereas base units for momentum and impulse is kilograms meters per second. They are two completely different concepts.
So the definition is just plain wrong. I tried to make an excuse for Homer, but I couldn't find one!
I hope somone can give me a good explanation for this! I want to think that I am the one who has this wrong, because I can't imagine Homer making such a basic mistake.