If Earth's radius shrank to one-half of its current size, but its mass remained the same, this would quadruple the strength of
on the surface.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

What equation is used to calculate the weight of an object on a plant ?

Which word expression describes how much to calculate pressure