Crea una gráfica elemento-masa

Which of the following describes a situation where competition between producers exists

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!

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?