An ideal gas is enclosed in a piston, and exactly of work is done on the gas. as this happens, the internal energy of the gas increases by exactly during this process, how much heat flows into or out of the ideal gas? enter a positive number to indicate a heat flow into the gas or a negative number to indicate a heat flow out of the gas.

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.