Asound wave has a frequency of 192hz and travels the length of a football field, 91.4m in 0.267s.  what is the period?

A6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400kg moving at -3.0m/s. what is their final velocity? +0.50 m/s -1.0 m/s +2.5 m/s -0.25 m/s

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.