1. what is cosmic radiation?
- radiation left over from big bang
- radiation that has always been around
- radiation that caused the big bang
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Other questions in this quiz
2. longitudinal waves oscillate..
- parallel to direction of travel
- perpendicular to direction of travel
3. what u-value is best?
- lower u-value
- higher u-value
4. what is diffraction?
- when a wave is slowed down
- when a wave shrinks
- when a wave gets spread out
- when a wave is absorbed
5. which matter has the most amount of energy?