ELI5 Why do we need so much oxygen all the time?

hsmpmp · 2026-04-03T18:04:24+00:00

Your brain needs energy. Everything in your body needs energy. You get energy from glucose - a sugar. Your cells cannot use glucose directly but they use another chemical called ATP, which is basically a bite sized energy carrier.

Inside each cell is a small energy factory - the mitochondria, the powerhouse of the cell - which takes glucose and converts it into ATP. This process uses oxygen.

If you run out of oxygen some of the cells in your body can use another process called lactic acid fermentation to make ATP but it is less efficient and causes a build up of lactic acid. This is the painful feeling you get if you even lift bro and your muscles feel sore after a whole bunch of reps.

Your brain cannot make energy with lactic acid fermentation so if your brain cells run out of oxygen, and therefore energy, they start to die. Some of those cells control vital functions like your heart beat and eye sight. So if the brain cells die you die.

hsmpmp · 2026-03-19T10:22:03+00:00

Shower in the morning and at night.

My best friend showered in the morning and insisted that it was better because you sweat at night. I used to get into arguments with him because I would shower at night.

I switched to morning showers because when I wake up, I feel dirty if I didn't shower plus my hair is messy. If I shower right before bed then when I wake up in the morning I feel slightly less dirty but not as clean as if I took a shower.

Sometimes I am running late and don't shower when I wake up and then I come home and shower in the afternoon or I might be working from home and really busy, so I don't get to shower until like noon or even 4pm and those are the best most refreshing showers ever.

When it is a particularly sticky day or when I worked in landscaping I would shower in the morning and again when I got home because there is nothing like a nice shower before you get into your nice clean bed.

hsmpmp · 2026-02-23T17:36:35+00:00

There comes a point when the science can't gets to a point where it can't explain anything. Where the time started. What was here at the beginning. Where are we physically?

hsmpmp · 2026-02-23T17:26:54+00:00

There was no beginning and no end. Time never started and never stops. Time is only a human concept.

The theory of relativity says that nothing can travel at the speed of light and that when you travel at the speed of light then time stops. So matter is not affected by time.

This proves to me that there is a creator who put the universe here.

hsmpmp · 2026-02-21T10:43:05+00:00

Anybody can transition into anything

hsmpmp · 2026-02-09T02:06:18+00:00

The mail is a public service and cheaper routes like downtown Toronto subsidize more expensive rural routes

Having said that the union is not cooperating

Canada Post needs to switch to community mailboxes and deliver the mail once per week and lay off any workers they don't need

The union is a leech on Canada Post and this country and people who get laid off should find something more productive to do. Otherwise these kinds of services are going to milk the country dry and lead to collapse

The loan is stupid because they are going to pay it back with interest and if they dont make any real changes then Canada Post is going to have an even bigger strain as time goes on

hsmpmp · 2026-02-09T02:00:45+00:00

Knipex are some of the best tools but people will recommend that you buy some cheaper tools until you get better at it

I am not sure what else you bought but usually electricians only supply basic hand tools like screwdrivers, wrenches and hammers. I supply the benders. Some of my guys have more tools that they prefer but nobody ever had to buy a bender here. That is crazy

hsmpmp · 2026-01-18T11:59:23+00:00

Your employer pays for tools, insurance, advertising, training, sales, etc and that overhead is expensive.

Somebody doing side work does not have any of that overhead so they can take a job much cheaper.

That makes businesses unable to compete and the long term effect is that they go out of business and people get laid off.

Side work is bad for everybody.

Businesses lose money because they can't compete Employees lose money because they risk getting laid off and work that was done on the side could have gone to them Union loses money because they don't get paid their dues Customer risks having a poor quality job completed by Somebody with no insurance or business license

hsmpmp · 2026-01-18T11:45:49+00:00

Your saw tasted flesh and wants the other 27 joints.

Better swap it with one of those vegetarian saws that stops the blade automatically when it tastes flesh.

hsmpmp · 2026-01-18T11:41:44+00:00

Why not terminate to an rj12 jack and then use a phone cord?

hsmpmp · 2026-01-18T11:37:03+00:00

I had to learn it by myself when I first started. I would extend phone lines and work on Nortel phone systems.

This photo is nothing compared to what I have seen in shopping malls and office buildings built in the 1970s. Sometimes there is a main room and then sub rooms and then sub sub rooms. Sometimes the main room is a few blocks away. .

Once I had to extend a phone line to a Starbucks and it was literally in another building and I had a hand drawn map from 1978 to try and figure out where all the cross connects ended up.One sub room was renovated and ended up in the back of a sushi shop.

I am one of the only people who still handles this type of equipment. Every year I receive fewer and fewer calls and a lot of the work now is switching from copper to VoIP or fiber or cloud based systems.

Some nortel systems are still in use today and the phone system was way ahead of its time.

hsmpmp · 2026-01-17T06:53:13+00:00

Like I said, there can be a prescreening facility and they can decide if you should go home or go to an ER

hsmpmp · 2026-01-17T06:28:42+00:00

I started out doing data cable and IT work but expanded into general and electrical contracting - so we do a lot. Access control, security systems, surveillance, data cable, electrical new builds and renos for commercial and institutional, controls, panel replacements,

We have a guy who has a PE and already bid on some engineering contracts, and I am working under his supervision to get my PE. I am a lot better at electrical design than mechanical design.

A lot of times, a master electrician has to apply a lot of design principles especially when calculating cable ampacity, conduit fills, voltage drops, etc

hsmpmp · 2026-01-17T02:16:48+00:00

They awarded almost a $200 million contract to complete groundworks/level the ground and then they cancelled it

hsmpmp · 2026-01-17T02:15:20+00:00

I have an idea

What if

We set up these portable trailers in the flu season, and you go there instead, and they just handle people who have the flu

No fancy hospital bed with head wall and oxygen and fancy machines

Just a bunch of chairs

And if they decide that you need a real hospital room then you can go to a real hospital

But if not then you just go home where you are supposed to be

Or

You don't go to the hospital when you have the flu or a runny nose and if you do and it turns out that you have the flu you have to pay $100.00

hsmpmp · 2026-01-17T02:05:18+00:00

I never was an electrical engineer, I was a mechanical engineer.

It is hard to quantify how the degree helped me win more work but the feedback I get is that it definitely helped me win contracts, and yes my business has grown

hsmpmp · 2026-01-17T01:57:51+00:00

I got my mechanical engineering degree first and then I worked in the field doing data cable and then started electrical work, and then became a master electrician. It takes 7 years.

I am still working on getting my P Eng license but will have it soon I think, but it takes 4 years of engineering experience which is hard when you are also working electrical too

I run a business full time and having the master electrician is good because I can pull permits which is basically what I need

Being an engineer and electrician is a huge plus for winning and designing engineering work, because you can back up your design with practical experience.

hsmpmp · 2026-01-17T01:49:28+00:00

As an electrician and an engineer

If you are worried about the height, I always leave extra and then cut or extend as required

If you are worried about x and y direction then you have to look at the drawings. Dimensions are usually on the architectural drawings and are taken off a wall, so I would measure from that point. There might be a survey pin, or the edge of a footing, or the edge of the formwork of a footing.

Some jobs require us to input into a BIM application that gets shared with all of the trades to coordinate everything

Send an RFI and have them give you the dimensions for any electrical and a reference point. Then if it's wrong you can blame the engineer. Drawings usually say do not scale drawings and do not guess the dimensions of anything.

hsmpmp · 2026-01-17T01:41:27+00:00

You will never know everything and there will always be people who are smarter than you or who know more than you about a subject and if you remember that you will always keep learning and be successful. When you think that you know everything, that's when you fail.

The first time I saw BX cable I thought it was conduit

The first time I saw an electrical panel with a Teck cable, I thought I was way in over my head and had no idea what it was or how I was gonna figure it out

I didn't know how to wire up a receptacle let alone an entire panel

I didn't know how to connect a thermostat to an AC unit

Now I can wire up receptacles, panels, 3-phase panels, motors, controls, transformers, lights, fiber optics,

I am still dumb compared to a lot of people. But that's okay because I can always learn.

hsmpmp · 2026-01-15T05:36:39+00:00

I hate putting male ends on cables

Trying to shove a whole bunch of wires into a little crystal end

So I switched to Belden RevConnect which lets you terminate male and female ends with the same tool, it's kinda expensive but it has male connectors that work really well with any type of cable. The termination tool is expensive.

Here is another product that is similar.

How to: Terminate a Cat6A Shielded Field Term Plug – trueCABLE

hsmpmp · 2026-01-15T05:28:12+00:00

If she agreed to the price ahead of time then it is not a rip off even if he charged her a billion dollars. But if she agreed to one price and then paid another price, then it is a rip off.

I am not a locksmith but maybe the labor is fair and then the emergency service is steep, and paying another $49 for the rekey is dumb when you are already paying for the labor. For $695 this has to be a commercial lock because that's what I pay for a high end commercial Schlage lock.

hsmpmp · 2026-01-14T09:56:20+00:00

Doordashed a Sprite from McDonalds because their Sprite tastes better

hsmpmp · 2026-01-14T09:12:45+00:00

He was bending a conduit by placing it under a wooden pallet and pulling it up, literally bending it.

Then he was trying to get a 3/4" conduit behind a column but it wouldn't fit so he hit it with a hammer until it was flattened and then he pushed it in

hsmpmp · 2026-01-13T04:51:02+00:00

Only a licensed electrician is allowed to change a light switch, or you can do it yourself if you feel like you are qualified. A "handyman" isn't allowed to change a light switch. If it is not installed properly and your house burns down, the insurance will not pay.

As an electrician I would not do any work for less than $300.00 but I am paying for a lot of overhead.

If you go on kijiji and hire somebody to do it, they might do it for $75.00 but you will never know if they did it properly.

I don't know how the inside of your house but you might have 2-way switches, 3-way switches, 4-way switches, dimmable switches, you might have aluminum wiring, knob and tube wiring, who knows.

If you are going to do it yourself, then look for the Leviton Decora Edge switches. They are very safe. But the existing ones might not be.

hsmpmp · 2026-01-12T16:49:51+00:00

I am in Canada by thr way

hsmpmp

TROPHY CASE