By accident, a large plate is
dropped and breaks into three pieces.
the pieces fly apart parallel to the
floor. as the plate falls, its momentum
has only a vertical component and no
component parallel to the floor. after
the collision, the component of the to-
tal momentum parallel to the floor must
remain zero, since the net external force
acting on the plate has no component
parallel to the floor. using the data
shown in the drawing, find the masses
of pieces 1 and 2.

Why cooking gas has a typical smell

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.