1.El diámetro del Universo visible es 8,8 x10^26 m El volumen del Universo visible se calcula usando 4/3 Pi radio^3. La densidad del universo visible es 9.9 x 10^-27 Kg/m^3 Calcule la cantidad de materia que hay en el Universo. Use la fórmula Densidad x Volumen = Masa Exprese su respuesta en Kg 2.La masa del sol es 2x10^30 Kg. ¿Cuántas masas solares se necesitan para completar la masa total del universo visible? Exprese su respuesta en gramos

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

Positrons are spontaneously emitted from the nuclei of

Most of the volume of an atom is occupied by the