## Baking: brownies w/o flour

Self-tutoring about baking: the tutor mentions a lesson he’s learned. I have two teenage sons who like brownies for breakfast. Last night, whipping up some quickly before bed, I thought the recipe came together a little quickly, but was happy …

## Health: COVID-19: can you get it twice?

Self-tutoring about COVID-19: the tutor checks if it’s possible for the same patient to catch it more than once. I’ve heard about the potential to get COVID-19 more than once, so decided to look into it. It seems that COVID-19 …

## English: acclimate, acclimatize

Tutoring English, vocabulary is always interesting. The tutor mentions something he noticed. The words acclimate and acclimatize mean the same – that is, to adjust to a new climate or reality. I’ve heard acclimatize often, but acclimate, seldom. Source: Mish, …

## English: how to pronounce composite

Tutoring English, you hear different pronunciations: sometimes a tutor feels the need to check. I’ve always said COMP-o-site. Yet, the other day I heard someone say comp-O-site. Their pronunciation surprised me, so I decided to check its validity. Merriam-Webster surprised …

## Math, philosophy: transitivity, part 0

Tutoring math, you encounter ideas that manifest in real life. The tutor mentions transitivity. Where and when I took grade 10 math, part of the curriculum was geometric proofs. It was completely different from the rest of the course: no …

## Math: Pythagorean triples and Fermat’s Last Theorem

Tutoring math, ideas are always important. The tutor mentions Fermat’s Last Theorem. A Pythagorean triple is a set of three integers that satisfy a2+b2=c2 There are infinite Pythagorean triples. However, there are no corresponding sets of integers for higher n: …

## Computer science: arity

Self-tutoring about computer science: the tutor mentions the term arity. arity: the number of inputs a function needs when called. Source: definitions.net

## Astronomy: can you see the Southern Cross from the northern hemisphere?

Self-tutoring about astronomy: the tutor mentions an interesting fact about the Southern Cross. Apparently, from inside the tropics of the northern hemisphere, the Southern Cross can be seen, low in the sky, during winter and spring. Source: www.constellation-guide.com

## Computer science: what is serialization?

Self-tutoring about computer science: the tutor mentions the concept of serialization. Serialization means producing a string of characters (or perhaps just 0s and 1s) that can be written to a file, so preserved against power loss. That string of characters …

## Biology: Anabolic steroids, part 0: addictive?

Self-tutoring about drug consumption: the tutor mentions anabolic steroids. I overheard that someone was “addicted to steroids.” “But can that be?” I wondered to myself. “I’ve never heard that steroids are physically addictive.” I decided to look further. My reading …