The ability of a material to transfer heat or electric current is called
a. conductivity.
b. insulation.
c. porosity.
d. convection.

Apossible explanation for a set of facts that can be tested by further investigation is called

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Which branches of natural science include the study of an organism that lived 10 million years ago