An underground tank with a capacity of 1700L (1.70m3 ) is completely filled with ethanol that has an initial temperature of 19.5?C. After the ethanol has cooled off to the temperature of the tank and ground, which is 10.5?C, how much air space will there be above the ethanol in the tank? (Coefficient of volume expansion of ethanol is 75*10^-5°C

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