The speed of a sound wave traveling through air is 400 meters per second. The wavelength of the wave is 25 meters. What is the frequency of the wave? A. 16 hertz B. 425 hertz C. 0.0625 hertz D. 10,000 hertz

Which position represents spring in the southern hemisphere? a) b) c) d)

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone, due to its high light availability and warm water temperature