As a result of some process, the internal energy of a system is increased. according to the first law of thermodynamics, au-q-w. how can one tell that the increase was due to orderly macroscopic work w or due to the flow of energy through disorderly microscopic means q? o (i) by measuring the temperature of the system before and after the process. ()by measuring the temperature of the surroundings before and after the proces o it is not possible to distinguish between w and q o both (i) and (ii) are correct.

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

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b.colder climates near the equator c.large waves on the cost of europe d.warm climates in northern europe

What is the solubility-product constant of barium sulfate, baso4, if a saturated solution is 1.03 ´ 10-5 m?