Drill bits are attached to power drills to make holes. drill bits are made of {blank 1} because they’re hard and resistant to corrosion. the bodies and handles of power drills are made of {blank 2} because they’re good insulators.

blank 1
-alloys
-ceramics
-composites

blank 2
-alloys
-composites
-plastics

Which property of fossils allow scientists to determine the relative rock ages..

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

If there's a small amount of friction between two surfaces, the result could be select all that applya. no movement b. heatc. a little bit of movementd. sliding around