the internal energy can be increased by . (a) transferring heat from the surroundings to the system (b) transferring heat from the system to the surroundings (c) doing work on the system

Which two statements are true about a system? 1. a system is a group of objects analyzed as one unit. 2. energy that moves across system boundaries is conserved. 3. there’s only one way to define the boundaries of a system. 4. all systems are made by humans.

If you are solving y2+2y=48 by completing the square, the next line would be y2 + 2y - 48 = 0 y2 + 2y + 4 = 52 y2 + 2y +1 = 49

Which characteristic demonstrates a healthy self-esteem? accepts others does not listen well seeks constant approval frustrates easily