A. What is the ending temperature of the iron? B. How much thermal energy was needed to heat the water?
C. How much thermal energy did the iron give to the water?
D. If the iron has a specific heat of 0.449 J/gC what was the temperature change of the iron?
E. What was the original temperature of the iron?

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=