If a liquid is heated, which of the following happens to both its energy content and the speed of its particles?
the energy increases; the speed increases.
the energy remains the same; speed remains the same.
the energy remains the same; the speed increases.
the energy increases; the speed decreases.

One or more substances changing into one or more substances is an example of a

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? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead