Find center of mass of a solid hemisphere of variable density? ( No any link allowed)​

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

If forces acting on an object are unbalanced. true or false

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of