It's not "activated" until their parliament approves it - and with the big EU trade carrot dangling it will be ever so tempting. It will probably just force Russia to export their oil and coal to China for China to burn it and then buy back the energy in some other form.
Re:Wouldn't the Galaxies just pass through each ot
on
When Galaxies Collide
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· Score: 1
Just for interest sake, if you scale the time dimension to the same ratio as the space dimension (stars are ~10^19 bigger than a molecule), a molucule would collide with another (at STP) every ~100 years instead of 2E-10s.
The panels you can buy and use for your house today have a 3-4 year energy payoff. (ie, they make an amount of energy equal to what was put in to them in production)
Which accounts for about half the cost of buying and installing said panels. So you can expect them to pay for themselves in about 8 years - except by then you'll need a new set of batteries. So ~10 years until it starts earning you money.
In fact I think swapping batteries at least 4 times in 30 years will provide a more significant form of pollution.
Ahhh red shift - of course...
I also can see now that the conclusions do not imply that our neighboring stars are all moving towards us - but instead they are moving so fast that they must have been very far away a long time ago. ...And combining the measurments with the estimated mass and rotational velocity of the galaxy reveals that the sun traverses a perfect circular orbit while every other star follows a complex epicycle every 250 million years.
It seems too fantastic to me that they can extrapolate the data more than 7 orders of magnitude into the past (15 years into 250 million years). At this extreme, usually the error terms and list of assumptions swamp the usefullness of the projections.
They imply they are measuring the change in both relative position and brightness of the stars. From their conclusion and simulation showing that stars appear closer now (than from 15 years ago), I guess this means the change in relative brightness was the dominating statistic in the extrapolations. I seem to remember that this is very difficult to measure accurately, let alone precisely - especially with land-based telescopes.
As long as an electric motor is spinning, there is a magnitic field. The electric motors in your razor and toothbrush probably have permanent magnets that spin relative to the stator coils.
But I think the frequency will depend on the motor's spin rate times the number of stators, so it probably isn't a 60Hz field.
The wires in your home have almost no net magnetic field from just a few inches away. The reason is that the supply (hot) and return (neutral) conductors are relatively very close together so that the fields cancel. GFCI breakers in your bathroom rely on this principle - when they sense a small field (usually 5mA imbalance) they trip. You can also try this with a clamp-on current meter.
A co-worker built a magnetic field detector with an LED and a few thousand turns around some iron laminates (for making transformer cores). The LED would only light-up at 0.5 inch for 50Amps in a conductor pair. However it was bright at ~4 feet for 2000 Amps (return conductor was about 2 feet away).
You're right!
Even time of year can make a huge difference - before Christmas I bought an Audiovox CDM-8600 for CDN$50 and got a $100 store gift cert (put towards a DVD player). Yes I had to sign up with a provider, but I need that anyway if I want to use the phone. This month the $100 bonus is gone.
Unlike most Canadian providers, BelMobility includes the access fee in the listed Monthly rate. And receiving text messages is free (sending is a pain anyway).
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It's not "activated" until their parliament approves it - and with the big EU trade carrot dangling it will be ever so tempting.
It will probably just force Russia to export their oil and coal to China for China to burn it and then buy back the energy in some other form.
This calculator gives some perspective to the comparison: http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic /frecol.html#c1
Just for interest sake, if you scale the time dimension to the same ratio as the space dimension (stars are ~10^19 bigger than a molecule), a molucule would collide with another (at STP) every ~100 years instead of 2E-10s.
The panels you can buy and use for your house today have a 3-4 year energy payoff. (ie, they make an amount of energy equal to what was put in to them in production)
Which accounts for about half the cost of buying and installing said panels. So you can expect them to pay for themselves in about 8 years - except by then you'll need a new set of batteries. So ~10 years until it starts earning you money.
In fact I think swapping batteries at least 4 times in 30 years will provide a more significant form of pollution.
Ahhh red shift - of course...
...And combining the measurments with the estimated mass and rotational velocity of the galaxy reveals that the sun traverses a perfect circular orbit while every other star follows a complex epicycle every 250 million years.
I also can see now that the conclusions do not imply that our neighboring stars are all moving towards us - but instead they are moving so fast that they must have been very far away a long time ago.
It seems too fantastic to me that they can extrapolate the data more than 7 orders of magnitude into the past (15 years into 250 million years). At this extreme, usually the error terms and list of assumptions swamp the usefullness of the projections.
They imply they are measuring the change in both relative position and brightness of the stars. From their conclusion and simulation showing that stars appear closer now (than from 15 years ago), I guess this means the change in relative brightness was the dominating statistic in the extrapolations. I seem to remember that this is very difficult to measure accurately, let alone precisely - especially with land-based telescopes.
The Earth's field is only static ("DC") if you're standing still. Every time you turn around you experience ~0.005mT at 1Hz.
As long as an electric motor is spinning, there is a magnitic field. The electric motors in your razor and toothbrush probably have permanent magnets that spin relative to the stator coils.
But I think the frequency will depend on the motor's spin rate times the number of stators, so it probably isn't a 60Hz field.
The wires in your home have almost no net magnetic field from just a few inches away. The reason is that the supply (hot) and return (neutral) conductors are relatively very close together so that the fields cancel. GFCI breakers in your bathroom rely on this principle - when they sense a small field (usually 5mA imbalance) they trip. You can also try this with a clamp-on current meter. A co-worker built a magnetic field detector with an LED and a few thousand turns around some iron laminates (for making transformer cores). The LED would only light-up at 0.5 inch for 50Amps in a conductor pair. However it was bright at ~4 feet for 2000 Amps (return conductor was about 2 feet away).
You're right! Even time of year can make a huge difference - before Christmas I bought an Audiovox CDM-8600 for CDN$50 and got a $100 store gift cert (put towards a DVD player). Yes I had to sign up with a provider, but I need that anyway if I want to use the phone. This month the $100 bonus is gone.
Unlike most Canadian providers, BelMobility includes the access fee in the listed Monthly rate. And receiving text messages is free (sending is a pain anyway).