cars

A:I think there an oxymoron. Smart people do not buy them. You would be better off buying Barbies Corvette.

A:Most cars will have a "high idle" when you first start them on a cold morning. There's a sensor that checks the temp of the air being sucked into the engine. If that temp is too cold, it makes the engine run a little faster (just as if you had pressed down a bit on the gas pedal) until the engine compartment warms up. So, the difference that you're probably seeing in the amount of "smoke" (exhaust) before and after your car warms up is simply due to a higher idle, and therefore more exhaust pressure - the hot air is moving faster out into the cold air, so it gets farther before it cools enough to "disappear". As for the "subdivision" versus "highway" difference, that's probably more a matter of speed. For example - if you lit a cigarette (not that I'm encouraging anybody to smoke) and held it up to your window, you'd see more smoke if you were driving slow than if you were driving fast - same effect.

A:Assumptions: 1) The entering car is stopped 2) The entering car begins accelerating as soon as the rear bumper of the car it will fall in behind passes its front bumper. What distance does it take a car to accelerate from 0 to 20 m/s at a rate of 1m/s²? 1) Final velocity = initial velocity + acceleration * time 2) Distance = initial velocity * time + 1/2 acceleration * time² Plugging in the known values, the first equation becomes 20 m/s = 0 m/s + 1m/sec² * x x = 20 sec Now we can calcuate the second equation D = 0 m/s * 20 sec + 1/2 * 1 m/s² * (20 sec)² D = 0 m + 200 m If we need to keep a 25 m space behind us, that gets added to the necessary distance.

A:In situations like this, I wait until the way is clear to go into the middle to turn so I don't end up blocking someone's way or vice versa. If in doubt, let the other driver go first.

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