) Where would the weight of an explorer be greater?

The summit of Chimborazo, in Ecuador, which is at a distance of about 6,384 km from the Earth’s center.
The bottom of the Mariana Trench, in the western Pacific ocean, which is nearly 6,370 km from the center of the Earth.
On the surface of Earth on the Equator line.

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?

How does the formation of intrusive and extrusive igneous rocks differ?