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Sega 500

774 views • 66 slides

Sound

Sound. Longitudinal wave requires a medium (cannot travel in a vacuum). Study of Sound. is known as ACOUSTICS. Properties of Sound. A sound is a vibration The vibrating causes the air molecules near the movement to be forced closer. This is called compression

621 views • 30 slides

What do you think?

In September we remembered the 70th anniversaries of the Blitz and the Battle of Britain. At 4:56 pm on 7 September 1940, the air raid sirens wailed as the German Air Force, the Luftwaffe, launched a massive raid on London.

277 views • 16 slides

What do you think?

In September we remembered the 70th anniversaries of the Blitz and the Battle of Britain. At 4:56 pm on 7 September 1940, the air raid sirens wailed as the German Air Force, the Luftwaffe, launched a massive raid on London.

165 views • 16 slides