You tried to push a broken-down truck until you were exhausted, but it won't budge. Your friend comes by and says that you have not performed any work Is he correct ? Why / why not ?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand

Which formula equation represents the burning of sulfur to produce sulfur dioxide? s(s) + o2(g) 4502(9) 2h2s(s) + 302(g) —> 2h20(0) + 2502(9) 4fes2+1102 —> 2fe2o3 + 8502 2802(g) + o2(9) v205 , 2503(9)