Two children are standing on an 80 kg wagon initially at rest, then the children jump off. The 40 kg boy jumps off left at 4 m/s and the 50 kg girl jumps off right
at 2 m/s. What is the speed and direction of the wagon after they jump?

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

What effects result when there is an impact between earth and an asteroid? check all that apply. a.massive flooding. b.extinction of many life forms.c.major earthquakes change in average global temperature.d. giant dust cloud