Self-tutoring about mechanics: the tutor shares a question and his own experience. Sometimes, typing a question into a search engine, you need only a few words before the anticipation algorithm completes it. I always feel good then, because I know…
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Category: mechanics
Physical chemistry: efficiency of internal combustion engine in hot vs cold weather
Jack
Posted in chemistry, energy, engineering, mechanics, physical chemistry, physics
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The tutor examines the idea that internal combustion engines are more efficient in cold weather. An upper limit for efficiency of an internal combustion engine is eff = (Tcombust – Tsurrounding)/Tcombust where Tcombust is the temp of the combustion cylinder…
Lifestyle: toy repair with J-B Weld, part II
Jack
Posted in engineering, handyman role, home economics, lifestyle, mechanics, physics
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The tutor continues about a toy repair, with some reinforcement ideas. While we were repairing the toy a few nights ago (see my previous post), my father-in-law suggested that, after the first repair cured, a second application should be considered…
Lifestyle: toy repair w/ J-B Weld
The tutor wonders about a pending toy repair. My younger son has a toy he really loves that broke. Specifically, a pot metal part sheared off. It’s a toy out of production, so can’t be replaced. Looking at the breakage,…
More unit conversions: engine volume
Tutoring high school math, unit conversions are often visited. The math tutor discusses the conversion of engine displacements. Back when I was a kid, I had a 50cc (cc:cubic centimetre, also written as cm3) minibike. My friends soon got…
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