After the collapse of a nebular cloud, otoms begin gravitating together to form a condensed center. What happens next in the star formation process? The gravitational attraction puis in more meter, causing the core to nest up. forming a protostar
Clouds of matter begin to rotate around the protostar and feen into a disasiape.
Nuclear energy runs out and the star des.
One of the condensed regions collapses under the force of is own gravity​

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 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. 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 warm balloon expands and rises. the cold balloon shrinks and sinks.