Year+9+Sound+Assignment

Option A. Compare light and sound Q1. What are their speeds? The speed of light travels at 299,792,458 metres per second and the speed of sound in dry air travels at 350 metres per second. Q2. What do they have in common? They are both a form of energy. They both can be bounced off an object. They both can be travelled through materials. Q3. What is a sonic boom? A sonic boom is a explosive noise caused by an object moving faster than sound, approximately 750 miles per hour at sea level. Q4. Can you hear sound in space? You cannot hear sound in space because sound travels in air and there are no air in space.

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