Physics 3.0 / 5 based on 1 rating ? PhysicsGCSEAQA Created by: Jessica CarruthersCreated on: 30-03-13 11:19 What are x-rays used in hospitals for They are used for CT scans and to destroy cancerous tumors near/ at the body's surface 1 of 8 Why are x-rays dangerous They can damage living tissue when passing through it because they are ionising 2 of 8 What are the properties of an x-ray They are absorbed by metal and bone. They are transmitted by healthy tissue. They affect a photographic film in the same way as a light 3 of 8 What frequencys can a human's ear detect between 20Hz and 20000Hz 4 of 8 What frequency does an utlrasound wave have Over 20000Hz 5 of 8 What is the equation for the distance travelled by an ultrasound pulse S= V x T where s= distance travelled v= speed of ultrasound wave t=time taken 6 of 8 What can ultrasound waves be used for They can be used in medicine for scanning, scanning unborn babies and soft tissue eg. eye 7 of 8 Why are ultrasound waves better than x-rays they are non-ionising, which means they don't damage living tissue 8 of 8
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