Apitcher throws a baseball at 45 m/s. the baseball has a mass of 400 grams. disregarding air resistance, the baseball's momentum when it hits the catcher's mitt is a0 kg*m/s.

If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance. what is its vertical displacement (in m) after 6 s?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.