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Two cities that are approximately 7,000 miles apart are New York City, USA, and Sydney, Australia. The distance can vary depending on the specific locations within each city, but they are roughly that far apart when measured in a straight line. This distance highlights the vastness of the Pacific Ocean that separates them.
City-center to city-center, Johannesburg, South Africa to Sydney, Australia = 11,045 km (rounded)
A city block is simply the distance from one intersection (or street light) to the next and can vary in distance depending on the city.
When we consider a moving object, the total distance it is displaced divided by the total time taken for that displacement is the average speed of the object for that time interval.If the moving object is a train that makes a few stops along its route from city A to city B, it will have some kind of average speed associated with its journey. An investigator will find the average speed of the train by dividing the total distance it traveled (the distance between city A and city B) by the total time that has elapsed since it left city A and arrived at city B.
If the city sits on a flat slab of concrete, we can use geometry of the cartesian plane to study it,and we don't have to go to spherical geometry. Let's do that. It's a lot less messy.Referenced to the city center, the mall is at the point (4, 4).Referenced to the center of the city, the park is at the point (-2, -4).The distance between them is sqrt[ (east-west difference)2 + (north-south difference)2 ]= sqrt[ (-2 - 4)2 + (-4 - 4)2 ]= sqrt[ (6)2 + (8)2 ]= sqrt (36 + 64)= sqrt (100)= 10 miles apart, as the crow flies