As you move toward a warning siren, the pitch
increases
decreases
stays the...
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The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.
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Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j
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Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil
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