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The lesson here is not that things are cyclical, but that they are inherently not stable. Many of the changes I mentioned are not cyclical, predictable, nor long term at all. The little ice age was...

For one, the mass cancels out when you have:
1/2mv^2>mgh
giving you
1/2v^2>gh

Second, maybe you have heard of someone called Newton? Drop a hammer, drop a feather from 25m, which hits the...

Here are a list of things that make me take pause. Some are from paleoclimatology, but a lot is recorded western history. There are countless other anecdotes, not all of which I have had time to...

I am guessing that the homework had to be turned in by now so here is an answer for you. Each of these energy sources is growing in value in it's place, but the negatives definitely tend to be...

With no air or mechanical drag the mass and energy of the car is irrelevant. If you were to drop the car from 25m, would it be going 25m/s when it hit the ground?

I can't recall the math at the...

Power transmission in the US is essentially all AC. Thomas Edison was an advocate of DC power because he thought it was safer, and liked the idea of lots of small local generators. Westinghouse...

This brings up another point: my tankess water heaters are mounted to walls much closer to the primary point of use than the old water heater closet. This not only decreases time and heat loss, it...

If you have ever had your drains back up into your standpipe, you might think twice, else you risk all that backflow into your washing machine.

The only repipe you should need for a tankless water heater is the gas supply line. A typical tank heater needs a 1/2" gas line, while a tankless needs a 1" or larger depending on the distance to...

The only danger of high water pressure is the water itself and, like having high blood pressure, the longevity of your hoses and fixtures. My first house received about $10,000 damage due to a burst...

I currently use both a large whole house demand water heater and a point of use electric heater. They are hard to recommend as a retrofit due to indirect costs, but do have some advantages. This is...

I had the same problem in my older home, which had a crusty 1.5" drain and standpipe in the garage. My washer also overflowed sometimes. Replacing the drain would involve a jackhammer, so that was...