Answer: Looks similar to a smoky quartz.
A proton has a positive (+1) charge, while a neutron is electrically neutral (carries no charge).
C) Amplitude wave is the type of wave that does not need a medium through which to travel.
answer:
because it benefits the soil. the long alfalfa stand life also gives the soil a chance to rest from frequent field crop rotations, helps provide nitrogen for subsequent crops, and improves soil tilth. this helps prevent pesticide and sediment movement to natural waterways.
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