Answer:
2,4
Explanation:
LOL WHERE THE PICTURE GURL?
Answer:
Turning off your lights will also help reduce the use of non-renewable resources that are harmful to the environment. You can turn off the lights during the day especially if you don't need them. You can also turn off your appliances to help reduce your carbon footprint and help save the planet.
<span>It's another energy balance equation, though: energy to start with is the same as energy that you end with. Suppose that we start a distance r0 from the Earth and end a distance r1 from the Moon, then the energy balance gives:
1 v02 - G M / r0 - G m / (D - r0) = 1 v12 - G M / (D - r1) - G m / r1
...where m is the moon's mass.
One simple limit takes D ? ? and 1 v02 ? G M / r0 (the escape velocity equation), to yield:
1 v12 ? G M / r1
v1 ? ?( 2 G M / r1 ) = 2377 m/s.</span>