The tutor shares quick, easy way to get a graph and equation from Excel, 2007 version. Let’s imagine your x data is in range a1:a10, your y-data, b1:b10. Select a1:b10, then click Insert, then the Scatter icon. Then, in the …
Excel: How to make a graph from data and get an equation, 4 easy steps Read more »
The tutor talks about the definition of a bar. Bar is a unit of pressure: 100kPa, to be exact. By comparison, an atmosphere is 101.3kPa. Therefore, 1bar = (100/101.3)*1atm = 0.987atm One atmosphere is 14.7psi. Therefore, 1bar = 0.987(14.7)=14.5psi. Source: …
The tutor investigates the idea that stainless steel is non-magnetic. I’ve heard from more than one source that stainless steel is non-magnetic: if you put a magnet to it, there isn’t attraction like you might expect with “ordinary” steel. According …
The tutor describes the phenomenon of Brownian motion. Brownian motion is the unpredictable motion of particles suspended in a fluid. The movement is disorderly because it depends on collisions with fast-moving molecules of the surrounding fluid, which happen at random. …
The tutor talks about why using a cloth or rubber glove might help to open a jar. I’m not particularly strong, so with household chores I have to improvise sometimes – for instance, when opening jars. When I was a …
Lifestyle: opening jars: why a cloth or glove might help Read more »
The tutor shares some research about why he gets shocked leaving the car. When the weather turns dry and summery, I love it. However, I face a summertime hazard: getting an electric shock when I leave the car. Sometimes the …
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 …
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, …
The tutor compares the work done raking yesterday to climbing stairs. In yesterday’s post I estimated that I had done 13,500J of work raking in the yard. Let’s compare that to a distance climbing stairs. On Earth, the force due …
The tutor reflects on the amount of work done raking. From a physics point of view, Work=ForcexDistance or just W=Fd Today, out raking, I had to break up the weedy ground of the bark mulch. I’d estimate, on average, the …