When you’re driving on a level road and there’s ice on the pavement, you hardly notice that ice while you’re heading straight at a constant speed. why is it that you only notice how slippery the road is when you try to turn left or right, or to speed up or slow down?

An electric power distributor charges residential customers $0.10 per kilowatt-hour (kwh). the company advertises that "green power" is available in 150 kwh blocks for an additional $4 per month. (green power is generated from solar, wind power, and methane sources.) if a certain customer uses an average of 391 kwh per month and commits to one monthly 150 kwh block of green power, what is her annual power bill