## Grocery shopping: calculation methods

Self-tutoring about ways to estimate a grocery bill: the tutor mentions some thoughts. When I get around to it, I don’t mind grocery shopping. One idea I hold to, though, is that one should have a pretty good idea of …

## Cooking, energy: microwave efficiency vs electric stovetop, part 1

Self-tutoring about efficiencies of cooking methods: the tutor compares electric stovetop with microwave cooking. Yesterday I was looking through a microwave manual and found some interesting numbers. It draws 1500 Watts but has a cooking power of 1100 Watts. This …

## Construction: cement vs concrete

Self-tutoring about construction definitions: the tutor mentions the difference between cement and concrete. I recall when I was a kid, perhaps in grade four or five, one of my fellow students had a bottle of rubber cement. It was used, …

Self-tutoring about home computer use: the tutor mentions an issue that might come up sometimes. The other day, one of our home computers was complaining that it was nearly out of memory. Looking through it, one couldn’t help but notice …

## Home computer use: how to close Teams

Self-tutoring about computer problem solving: the tutor mentions a trick. My computer security suite complained that, to update Teams, I had to close it. I would have said it wasn’t open. Yet, I restarted the computer, thinking that would certainly …

## Math: factors, part 1

Tutoring math, factors are important to understand. The tutor gives a briefing. A factor, in math, means a number that divides into another with no remainder. For instance, 4 is a factor of 12 but 5 isn’t. When you break …

## Canadian weather: first day of spring 2024(?)

Self-tutoring about local weather in Canada: the tutor makes an observation about 2024. I’ve mentioned over the years, in numerous posts, that really, spring weather doesn’t arrive to all parts of Canada at the same time. Therefore, although the first …

## Construction: prestressed concrete, part 1

Self-tutoring about construction: the tutor mentions prestressed concrete. Prestressed concrete, as I understand, is a block of concrete that contains steel reinforcement that’s been stretched. As a result, the concrete itself is experiencing an internal elastic force because the steel …

## Energy: renewable natural gas

Self-tutoring about energy: the tutor mentions the idea of renewable natural gas. Renewable natural gas, or RNG, originates from breakdown of organic materials. These can be manure, landfill waste, crop leftovers, food leftovers, sewage, etc. Having these break down in …

## Geography: winter forest fires

Self-tutoring about geography: the tutor mentions the idea of winter forest fires. Apparently, winter forest fires are a known phenomenon. I’ve never heard of them until today, so was surprised. In particular, the article I read, from Radio-Canada, explains that …