Why do circuit breakers go up for on and down for off?

I call that a shithole. Countryside is much nicer.

If you want me to be more skilled at it you need to teach by example.

Here, we don't need amps. We have decent transmitters in the first place. Or TVs designed to amplify inside them instead of farming it out to another box.

She doesn't need to understand, her TV does.

You probably would need an amp if the signal is split between nine TVs. And you still have to stop idiots from shorting out their aerial sockets, accidentally or deliberately.

Yep. less amplification, than buffering for distribution purposes. I have 9 wall sockets in the house. Labgear unit sorts it all out

That wouldn't flow properly, and the warning light would come on.

Oh, I thought lead was good apart from the alledged cancer.

Wouldn't that make it worse?

I don't service a car.

You must not drive in places people drop nails. Builders are very clumsy.

Or just use your eyeballs.

I prefer not to spend money before I have to, and I may never have to.

How old/mileage a car do you drive?

Are those the ones which are way brighter than normal bulbs, and get away with it because the input power is the same? Thanks for dazzling me, you're asking for a collision.

You replaced bulbs which weren't broken? ROFL!

My car is too old for that.

That's Commander Kinsey assuming that he can learn. Over the past year or so he has made it blindly obvious that he can't .

He's sea- green ineducable, and seems to take pride in being particularly obtuse, You can take a Scottish wanker to water, but you can't make him think - much better hold him under until he stops being a pest.

Clearly not.

Talking of big trains....

Friction isn't just related to surface area, but also material.

Friction just isn't related to surface area, but instead material.

Momentum not Inertia.

Same thing

As TNP has said they are virtually the same, one is vector and one is a scalar, much like velocity and speed.

Inertia controls the rate of acceleration of a mass due to gravity, that's why everything falls at the same rate in a vacuum.

A massy object has inertia whether it's moving or not. It only has momentum if it's moving.

Sorry, but gravity really has nothing to do with inertia.

Inertia is the idea that an object will continue its current motion until some force causes its speed or direction to change.

or:

TNP is wrong - as he usually is. Momentum is the product of mass and velocity. Speed is merely velocity in the direction of motion - you've chosen to ignore the direction of motion, rather than to throw away an independent variable.

It is interesting that mass - as measured as inertia - is the same as gravitational mass

The concepts are clearly closely related and general relativity makes sense of that, but we still have to couple general relativity with quantum theory.

Momentums is the technical scientific term for the common or garden term 'inertia' - the natural tendency for stuff to keep moving at a constant speed and resits changes to it. Has has been pointed out already momentum is technically a vector. But people don't think vector, much, when they use the word 'inertia'.

For me, momentum is the technical refined description of what ordinary people call 'inertia'