Two loudspeakers emit sound waves along the x-axis. the sound has maximum intensity when the speakers are 19 cm apart. the sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 29 cm.

what is the wavelength of the sound?
express your answer using two significant figures.
\lambda =

{\rm cm}

part b
if the distance between the speakers continues to increase, at what separation will the sound intensity again be a maximum?
express your answer using two significant figures.

{\rm cm}

the closer the planet is to the sun, the larger the gravity

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

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