According to newton's 1st law, the law of inertia, if you hit a baseball with a bat it will a. hurt your hand from the reaction force b. accelerate according to the applied force c. fly in a straight line unless an outside force changes its course d. fall to the ground because of gravitational pull

C. fly in a straight line unless an outside force changes its course.

So the Newtons first law of motion states that an object in a state of uniform motion tends to remain in that states of motion unless an external force is applied and base on your question the possible answer would be letter B. accelerate according to the applied force 

Ifound this on google “the middle ear contains three tiny bones known as the ossicles: malleus, incus, and stapes. the ossicles were given their latin names for their distinctive shapes; they are also referred to as the hammer, anvil, and stirrup, respectively.” i hope this you for what your looking for

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;