Mantle convection is? heat from Earth's inner and outer cores and is transferred through the mantle.

Heat in the inner core that is trqansfered through the mantle.

heat in the outer core that is transferred through the mantle.

all of the above.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.