¿El momento de torsión neto cambia cuando un compañero en un subibaja se pone de pie o se cuelga de su extremo en lugar de sentarse (¿Cambian el peso o el brazo de palanca?)

Asimply means that over time there was some sort of change.

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength

Which family/group are gases at room temp. !