Our back yard is basically level but it was filled with rubble, then gravel, and then covered with a skinny top layer of soil on which the grass grew green for a while. Not any more. Those rocks have to be removed.
That took 11 buckets of rocks.
Tuesday, March 22, 2016
Tek Tip 2sD - Grass over Rocks
Grass won't stay growed over a rock base.
Our back yard is basically level but it was filled with rubble, then gravel, and then covered with a skinny top layer of soil on which the grass grew green for a while. Not any more. Those rocks have to be removed.
That took 11 buckets of rocks.
Our back yard is basically level but it was filled with rubble, then gravel, and then covered with a skinny top layer of soil on which the grass grew green for a while. Not any more. Those rocks have to be removed.
That took 11 buckets of rocks.
Friday, March 18, 2016
Freaky Fzx Friday - Neutrinos
Radioactivity is the process whereby a nucleus becomes more stable by ejecting particles and energy.
By 1931 we had been studying radioactive decay for 3 decades. Beta decay is one type. An electron is kicked out from the nucleus by a process that looks like this.
There are no electrons in the nucleus so the process is a bit strange. Imagine that a neutron in the nucleus becomes a proton and an electron and the electron gets ejected from the nucleus.
By 1931 we had been studying radioactive decay for 3 decades. Beta decay is one type. An electron is kicked out from the nucleus by a process that looks like this.
There are no electrons in the nucleus so the process is a bit strange. Imagine that a neutron in the nucleus becomes a proton and an electron and the electron gets ejected from the nucleus.
Thursday, March 17, 2016
Tek Tip 2sD - Extension Cords
Unlike many things in life, shorter is better for extension cords. Fatter too.
Longer = more resistance = more VOLTAGE LOSS and more HEAT LOSS
Longer = more resistance = more VOLTAGE LOSS and more HEAT LOSS
Friday, March 11, 2016
Monday, March 7, 2016
Tek Tip 2sD - Light Bulbs
A long time ago, Thomas Edison patented the first light bulb with open market success. That was 1879. It's an evacuated glass tube with a glowing filament that puts out immediate light and a lot of heat.
Here are three bulbs from last 2sD's Tek Tip
Here are three bulbs from last 2sD's Tek Tip
Friday, March 4, 2016
Freaky Fzx Friday - Medical Radioisotopes
This is the periodic table. You study it extensively in Chemistry and we begin Nuclear Science with a quick review of it.
That's all about the electrons and the valence shells and how atoms interact to form molecules. Below is the chart of the nuclides and it's all about the nuclei and their masses and modes of radioactive decay. Every tiny block is a different nucleus.
That's all about the electrons and the valence shells and how atoms interact to form molecules. Below is the chart of the nuclides and it's all about the nuclei and their masses and modes of radioactive decay. Every tiny block is a different nucleus.
Tuesday, March 1, 2016
Tek Tip 2sD - Dryer Repair #2
Last year I had to replace the belt on my dryer. YouTube helped me with the replacement.
Dryer Repair #1
This time my wife told me it wasn't heating the clothes. When I tested it, of course, it worked fine so I opened the burner inspection cover and watched it while testing all the settings.
I turned again to my YouTube assistant.
Dryer Repair #1
This time my wife told me it wasn't heating the clothes. When I tested it, of course, it worked fine so I opened the burner inspection cover and watched it while testing all the settings.
I turned again to my YouTube assistant.
Subscribe to:
Posts (Atom)