A driver traveling at 25 m/s to the south sees a red traffic light ahead and applies the brakes, causing the car to slow down with an acceleration rate of 4.5 m/s2. What is the direction of the car’s acceleration, north or south?
How much time will it take for the car to come to a complete stop?

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

The geological theory that states that pieces of earth's lithosphere are in constant slow motion is the theory of plate tectonics.

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips.