What is the Asthenosphere A. the middle portion of the mantle; not very dense
B. the middle portion of the mantle; extremely dense
C. the outer layer of the earth's crust
D. the inner core of the earth

Asher cycles 12 miles in 16 hours. what is his speed?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.