During a baseball game a pitcher threw a baseball, and the catcher, who was behind home plate, caught it. which is true about the pitcher when the catcher caught the ball?
a) he saw the catcher catch the ball first.
b) he heard and saw the ball at the same time.
c) he heard the sound of the catcher's mitt first.
d) he saw the catcher catch the ball, but did not hear it.

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

Research the neutrino using the internet and report your findings. in a nuclear decay, the nucleus of an atom splits apart. larger particles can be detected and their masses and velocities can be recorded. explain how the existence and properties of the neutrino could be predicted using the conservation laws.

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference