Scientist wants to see which type of liquid will make plants grow taller. The scientist gives three plants an equal amount of water, sunlight, soil, and amount of growing space. The scientist gives one plant soda, one plant milk, and one plant water. After a month the height of each plant is measured. What is the hypothesis, independent variable, dependent variable, constant variables, and control?

The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.