jrmichler's latest activity

Much of the hot air does not actually add heat to the surface, but it does give a good upper limit to the amount of heat needed. Using...

Many thanks for doing the leg work in this one!! An interesting result I was looking for a practical example of this and I realised...

I just finished doing some heat transfer calculation for something else. It's been a long time, so getting back up to speed took time...

I have been collecting articles and papers on lifestyle vs health. Here's some about dementia: Healthy lifestyle reduced risk of...

A rule of thumb is that a typical normally aspirated automobile gas engine burns 0.5 lbs of gasoline per horsepower-hour. Since...

I calculated the sun image diameter assuming: Sun 865,000 miles diameter Sun 93,000,000 miles distant Focal length 150 feet Perfect...

About 1980, my grandmother had her wash machine plugged into one of these adaptors. I asked her if that really worked, and she said...

You are correct. For moving 4000 lbs, you need some math. Here is how I solve this type of problem. Step 1: Sketch an acceleration -...

This video of two hungry fawns feeding from their mother was taken looking out my living room window using a cell phone camera. We only...

These spam posts get moderated so fast that most people never see them. The moderators have a special button that deletes the post and...

Just ONCE, I wanted to see a post titled Status Update that was not a blatant, annoying spam post by a new member. So here it is...

Fall colors on the ATV trail less than 5 minute walk from my house. The colors are not quite at their peak. This is Northern...

I have been using LibreOffice for 10(?) years now. No problems with losing / exploding / crashing / failing documents. I only use...

Search dashpots in McMaster-Carr. Dashpots are designed to slow something down for a soft landing. You will need some sort of bracket...

Just remove the question from "defense contractors" and think about it for any job in engineering. The engineering challenges at, say...