Which of the following would decrease the human ecological footprint
a. using bottle water instead of tap water
b. using public transportation instead of riding a car
c. buying books instead of borrowing from the library
d. using hot water instead of cold water to wash clothing

What does si stand for,when referring to a system of measurement

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.