Un candidato a la presidencia de la república de Colombia, tiene un debate con los jóvenes de las
universidades públicas. Para esto utiliza unos
amplificadores de sonido, ya que se encuentra en
campo abierto y su voz no se propaga con facilidad.
¿Qué fenómeno sustenta el funcionamiento de los
amplificadores? ¿Por qué?
Ayuda por fa

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

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b