Which part of and organism is preserved in cast and mold fossils

What is created when solids,liquids,an gases mix with one another

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system

Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?