Presented by:
Ahmed Hamed


Physics of diagnostic ultrasound
Sound :is amechanical energy transmitted by pressure waves in amaterial medium#sound categories: Infrasonic: less than 20 HZ Audible sound: from 20 HZ to 20 KHZ ultrasound:from 20 KHZ to 30 MHZ #source of motion :any vibrating object
#The source of sound waves in medical ultrasound is apiezoelectric transducer
Wave motion : [/b ....etc

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Physics Question paper



1.Which of the following is not an electro magnetic wave
a) x-rays b) alpha-rays c) gamma-rays d) light rays

2.Electro magnetic waves of wave length ranging from 100Åto 4000Å come under
a) x-rays b) UV region c) visible region d) n infra-red region

3.Electro magnetic theory suggests that the light consists of
a) magnetic vector alone b) electric vector alone c) electric
and magnetic vectors perpendicular to each other. d) parallel electric and magnetic vector

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1. Development of External Heating technologies and improvement in thermal insulation of Garments for Extreme Cold Conditions
2. A Reference Searching Related to Nanomaterials, Food Packaging and Sustainability
3. Formation of gallium induced nanostructures on single crystal HOPG surface
4. Use of piezo-impedance transducers for condition assessment of bones ....etc

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