Recent content by whome9

A world class cyclist can put out 400w for 20 minutes. You can probably put out 1 hp for 20 seconds. If I find my link for the all-day-work-output of a person I'll post it. Use resistors in series with, or a pulse width modulated voltage across, your alt's field winding to adjust the...

The eye responds to peak brightness more than to avg. brightness.

Then 1 A-h is the "C" rate. Usually they test at a 20 hr (C/20) rate, which means 50 mA for 20 hrs. At C/100 you will probably get more than 1 A-h.

50% mortality is something over 36 feet, but the people who live and fall from that distance need physical therapy for the rest of their lives. As to the force when you land, it depends on how fast you decelerate. If you land flat and your body is only compressed a few inches there will be...

At what time in the video do they show the meteorite?

Steel weighs about 490#/cu.ft so estimate/calculate the volume of a paper clip and go from there.

For a voltage divider you could use formulas for uncorrelated errors. If I can find my hard copy I'll post them. Another way is to approximate the normal distribution with 6, 10 or 20 points and then have your spreadsheet combine them according to the voltage divider formula. 20 points...

You can use your existing furnace to calculate heat loss, providing you know its efficiency with a duty cycle other than 100%. You need your Heating Degree Days for a month, your fuel usage for that month and your Outside Design Temperature to a 95% or 99% level. My spreadsheet that does...

Venn diagrams are a way easy method for visualizing Bayes' equations.

Use Wiki or Excel: future value of annuity, present value of an annuity, finance calcs. for engineers, equipment replacement strategies, etc. It's on the Web or in any tech lib.

I read that a force is =ma, but that if you substitute ma for each force it leads to computational or other difficulties.

The current through the bias network should probably be 5x or 10x the base current for a circuit design with repeatable performance.

There is a built-in lifespan for humans, which is ~85. The book The Rectangular Curve discusses this.

https://www.amazon.com/dp/0691023565/?tag=pfamazon01-20

On subject that is always useful and related to Game Theory is decision making in the face of uncertainty.