Which is true about what models allow us to do to the system being studied? A) Models are more accurate. B) Models are more waste of natural resources. C) Models require more scientists to study a system. D) Models allow many systems to be studied more than before there were models

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

bc blah

explanation:

bc blah

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

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bioteacher101