Less expensive. The cost difference between building a roundabout and a traffic signal is comparable. Where long-term costs are considered, roundabouts eliminate hardware, maintenance and electrical costs associated with traffic signals, which can cost between $5,000 and $10,000 per year.Roundabouts are also more effective during power outages.here long-term costs are considered, roundabouts eliminate hardware, maintenance and electrical costs associated with traffic signals, which can cost between $5,000 and $10,000 per year. Roundabouts are also more effective during power outages.
THE EARTH'S MAGNETOSPHERE. The magnetosphere is the Earth's magnetic environment. The Earth is a huge dipole (2-pole) magnet. The Earth's magnetic field is probably cause by its molten iron-nickel core. This magnetic field is aligned with the north and south poles, and has reversed many times during geologic history.
A magnetic tail or magnetotail is formed by pressure from the solar wind on a planet's magnetosphere. Solar wind contains high energy particles which are produced by solar storms. These particles affect Earth.The coronal mass ejections cause changes in the magnetic field of the earth when they collide with the field. just now. Report Abuse. The magnetosphere is a region that surrounds the Earth's magnetic field and extends far out into space, some 36,000 miles, or possibly more than 1,000 times the Earth's radius, according to NASA's Cosmicopia website (see link in Resources).