Can I Disable My Own Car Alarm?
Don, According to Genesis 15:1 After these things the word of the LORD came to Abram in a vision, saying, Do not be afraid, Abram, I AM YOUR SHIELD, your exceedingly great reward. This passage in Genesis is a reference to Psalm 84:9. So God is our shield.
Instant so far as observation has determined. gravity appears to be a non-native force acting within out universe, it does not obey the speed constraints of our universe. For instance, if we remove the sun as you suggest, there would be no delay in feeling the effects on earth, and actually the light would still continue to be felt here for roughly 8 minutes as you say. But the gravity would be instantly removed.
electric blanket are much more cheap and is very safe. I use to leave mine on (by accident) all the time. The only think you need to worry about in that case is burning out whatever it is that heats it. I think they are coils. Then all that would do just make it less hot.
Compare the Wattage between the two. The lower the cheaper. However, do bear in mind that you'll need to be actually lying under the blanket for it to have its effect. Also if there are other people in the same room, using the traditional heater may be much more cost effective.