When I stand at the water's edge and look out over the ocean, how far away is the horizon? Is there an equation to figure it out?
WHAT'S INSIDE: PHYSICAL SCIENCE
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If a drugstore is the equivalent of a 7-Eleven where you can pick up ready-made apple pie pockets, then a compounding pharmacy is your corner bakery where an individual tart is made just for you. But are these specialized pharmacies safe?
What makes sound a weapon? Review the basics of sound and discover exactly how the LRAD produces its "beam of sound." We'll also explore LRAD's hailing and warning abilities and other uses for sound.