Please help please it’s science What length of rope must the operator pull and what is the ideal mechanical advantage (MA) of the pulley system if the 15 N load is to be raised 1 m? (Assume the rope is sufficiently long to accommodate
movement of the load and that all pulleys are frictionless)
1.0 m, MA-3
А
B
3.0 m, MA-3
С
10 m. MA-1/3
D
30 m, MA.13

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2