'Busy street corner' diaporamas de présentation

State of Connecticut Radiation Professional Volunteer Program (CT-RPVP)

State of Connecticut Radiation Professional Volunteer Program (CT-RPVP). LESSON 1. Principles of Radiation and Radiation Protection. Objectives. Describe the two forms of radiation and give examples of each Distinguish between radiation exposure and radioactive contamination

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671 views • 33 slides

NOISE

NOISE. Noise - what is it?. Unwanted sound sound is vibrations in air Sound Pressure Level decibels (dB) - sound loudness Frequency hertz (Hz) - vibrations per second Good human ears hear sounds between 20 to 20,000 Hz. Types of Noise . Continuous same noise level over long periods

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Phys101 Lectures 32, 33 Sound, Decibels, Doppler Effect

Phys101 Lectures 32, 33 Sound, Decibels, Doppler Effect . Key points: Intensity of Sound: Decibels Doppler Effect Ref: 12-1,2,7. Characteristics of Sound. Sound can travel through any kind of matter , but not through a vacuum . .

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