In the Earth's mantle, heat is transferred in large convection currents. Within these currents,
A.
cooler rock rises and hotter rock sinks.
B.
hotter rock rises and cooler rock sinks.
C.
hotter and cooler rock sink but do not rise.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

How does an observation about an object differ from an inference about that object

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.