SteamyTea

I like to think of an inverter as a CVT gearbox. Most of the time you can drive a car in third gear, be a bit hard to get going, max speed will be limited, and fuel consumption will be dreadful. Generally electronics are reliable, the biggest problem is replacement parts are silly money, we had a board changed in the dish washer at work, the problem was a relay, 20 quid part. The repair was over £1200, for a secondhand board. They kept our broken one which I could have repaired.

Have you tried steaming to see if it softens? I am always amazed what comes off with a bit of hot water.

Would it not depend on what the numbers show, there is more than one way to skin a cat.

While I agree that it is cheap, it has for the last 40 years or so been about 5% of household income, which is where it is at the moment. Back in 1990, I was paying 10p/kWh for electricity. So only doubled in last 35 years. My wage has gone up more.

It is a natural cycle. Increase the amount of CO2 in the atmosphere and the global temperature will rise, well know science. Eventually all the stored carbon and hydrocarbons will be burnt and, apart from a small contribution from volcanoes and rotting vegetation (if any left), the temperature will start to slowly decrease. We are pretty certain we know how the Earth came out of the last ice age, but not seen too much research on how a planet cools from a CO2e rich atmosphere. Venus is not changing much. Though I doubt that is how your friend views it. Probably sees starving people in developing countries and thinks it is their own fault that crops have failed due to variable weather patterns, and if they were still a colony of ours then everything would be fine for them.

Or better.

PV installations use them.

Got felt up a lot.

Not what goes though mine. I pressed the button and got this message. 'High Demand'

I used to work for the RNIB.

Why I posted it up.

Just asked your wife and she said she was in a hurry to get home.

Air at 16°C and 75% RH has about 10 grams of water in it per m3. If half of that is removed, to get 5lt of water (5000g), then 2000 m3 of air needs to be processed. That is about 2.5 tonnes. Sounds a lot but is only 23 litres/second. The energy needed to condense the vapour to liquid is 11,300 kg, or about 3 kWh/day, or 130W. From all that, does a large dehumidifier really need to be used, or is the process really inefficient.

What is, making chlorine or preventing it being made?

Chlorine can be produced from seawater quite easily with electrolysis.

Youtube has some great resources on it.

I was helping on my friend's farm. Had to get some sheep into a pen. One just refused to go in and just kept stepping backwards towards me. My farming friend said 'a good sheep will do that for you'.

This is not for normal low voltage, or high voltage, but shows how transformers can be wired differently. You may find a bit more in this, long times since I have read it. Students_Guide_to_the_IET_Wiring_Regulations_-_The_institution_of_engineering_and_technology.pdf

That is a shame, we need more creative engineers, even misguided ones. We tried filling a hole in the car park with Postcrete, was a water filled and it never set properly.

I don't think so, but there may well be some confusion over terminology. Used to use an impact driver for undoing stubborn screws and bolts, they could be revered to tighten up as well. https://en.wikipedia.org/wiki/Impact_driver Then a hammer drill, also know as percussion drill or impact drill. https://en.wikipedia.org/wiki/Hammer_drill So I may well be wrong, but ours at work have this torque increasing mechanism, based on a hammer and anvil. I always think of a 'hammer drill' as something that just vibrates the drill bit up and down as it rotates, but does not increase torque. As I mentioned earlier, it is based on this physics. https://en.wikipedia.org/wiki/Jerk_(physics)

My understanding of impact drills are really jerk drills. They have a spring, ratchet and rotating mass that is released every rotation. That mass caused a jerk force increases the torque on the drive shaft. Stopping torque is a third power of mass, rather than the second power of speed.

We could tax them on it. Mine does 35 mpg/tonne (ish), my last car 37 mpg/tonne, but it was not so good. 60 MPG for a 1.6 tonne car as opposed to 62 MPG for a 1.8 tonne now. Many years ago, when I was studying automotive engineering, I read an article about this, seem to remember at the time (1982) that mass divided by 540 gave the gallons per mile. My passengers on Tuesday were most impressed that my car does 4 lt/100 km (they are used to that metric).

I hate the noise that impact drivers/drills make. Is there a good drill that is non impact, or at least had the facility to turn the feature off. We use Milwaukee stuff at work, the circular saw is very good. Nor so keen on the rest of the kit, though the angle grinder was alright, if a bit on the large side. Mixing makes, if bought in a good deal is not so bad as you often get one charger and two batteries, so saves getting a second charger.

Just a thought, possibly a bad scenario. If there are a number of grid connected system, and one of them is an islanding system that is incorrectly wired in, so it does not disconnect from the grid, would the other systems still be connected and running? I know that most inverters check that grid impedance as part of the running/disconnect protocol, but that may be within tolerances in a rural setting. An unlikely scenario I know, but with millions of systems fitted, unlikely becomes inevitable.

Ah, Trenton, PA, part of the rust belt. I lived in Meltdown Midtown, PA, slightly more classy. Unless she is on the NJ side.