A researcher wanted to test the effectiveness of different levels of sunscreen on time it takes to get a sunburn. The researcher plans find participants age 20 - 30 that all have moderate risk for sunburns. One group will wear SPF 30,
another group will wear SPF 50, and the third group will not wear sunscreen. The participants will be outside for 3 hours of
sun exposure. He will record the time it takes for sunburn to set in (if any occurs) and the severity.
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Movement that is like a t a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. transfers energy from one location to another a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave