KE = 1/2(100 kg)(100 m/s)^2 = 500000 Joules ----------------------- KE = 1/2(100 kg)(50 m/s)^2 = 125000 Joules ---------------------- 5â¦00000 Joules/125000 Joules = 4 ------ The kinetic energy is reduced by a factor of 4 because the speed is squared.
Earth, the fifth-largest of the eight planets in the Solar System belongs to the Milky Way galaxy and is orbiting about 28,000 light years from the center of the galaxy. It is believed that currently it lies about 20 light years above the galaxy's equatorial plane in the Orion spiral arm.
Best Answer: the earth has five atmospheres: troposphere, stratosphere, mesospere, thermosphere, and exosphere. the top of the exosphere is about 360 miles above the earth, once your out of this you are in outerspace, most people would consider 55000 feet (9 miles) to be space because you can see the curve of the earth and the sky is darker.