4) A copper cable has a current of 1200 A running through it. There is a potential difference of 0.016 V between two points on the cable that are 0.24 m apart. Calculate the radius of the cable.

99×10-3m or 0.99cm

Explanation:

The detailed solution is found in the image attached. We can obtain the resistance from ohms law, V=IR.

Using this value obtained for resistance, we substitute into the equation shown in the solution to find the area of the cable. Afterwards, the radius of the cable can be obtained from its area as shown in the solution.

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