Which part of an experiment do scientists change the independent or dependent variable?

What is the equilibrium constant of aa+bb=cc+dd

What does the symbol (–hfus) indicate in a phase change?

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!