Allison pulls on a refrigerator with 200 N of force . Fred helps her out and pulls on the refrigerator in the same direction with 300 N force . What is the net force on the refrigerator ? _N

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world