A mixture of powdered iron and sulfur reacts chemically when heated. What will be formed? A. a solution
B. a compound
C. a single element
D. two other elements

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.