A physics student drinks her coffee out of an aluminium cup. The empty cup has a mass of 120g
at 20.0°C. Assuming she pours in 300g of coffee at
70°C, what is the final temperature after the coffee
and the cup must have attained thermal
equilibrium? (Assume coffee has the same specific
heat capacity as water and that there is no heat
exchange with the surrounding).​

The correct answer is 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 

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