108j of work was done on a closed sysem. during this phase of the experiment, 79j of heat was added to the system. what was the total change in the internal energy of the system.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=