Aworker leaves home at 9: 00 am, travels 40 km to the office, and then returns home at 5: 00 pm. what is the magnitude of the worker's displacement during this 8-hour span of time? 80 km 0 km 40 km 10 km/h

Hi! The answer to this problem is 0km.

Ok, the definition of displacement is the change in position.

So if in this 8 hours i first travel 40 km in one direction, and the i traveled -40km in the same direction i would be on the same place, so the total displacement would be 0 km.

half of a circle

explanation:

the arrow and the top of the circle is matching together. it is not a polygon because a polygon would always be the same shape. therefore, an half of a circle is called semicircle so you would find the radius of it.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.