Medical Physics 0.0 / 5 ? PhysicsMedical physicsA2/A-levelAQA Created by: Rosie WoodCreated on: 03-06-15 12:57 x-ray energy used to distinguish between bone and tissue 30-100 keV 1 of 33 CT scanner voltage 100-150 kV 2 of 33 wavelength of an x-ray 10^(-10) m or less 3 of 33 image intesifier increases brightness by x 5000 4 of 33 time taken to produce image using intensifying screen 30 x faster 5 of 33 1 MeV to joules 1.6 x10^(-13) 6 of 33 avogadro's constant number of molecules in 12g of carbon-12 7 of 33 atomic mass unit 1/12 of the the mass of one atom of carbon-12 8 of 33 Celcius to Kelvin + 273 9 of 33 the separation needed to resolve an image 2 or more retinal cell diameters 10 of 33 wavelengths the eye can see 400-650 nm 11 of 33 blue cones 430 nm peak, smallet peak 12 of 33 red cones 590 nm peak, medium peak 13 of 33 green cones 550 nm, tallest peak (for cones) 14 of 33 rods 500 nm, tallest peak (overall) 15 of 33 range of frequencies a human ear can hear 20-18000 Hz 16 of 33 ear ossicles amplify force by x 1.5 17 of 33 threshold intensity 1 x 10^(-12) Wm-2 at 1 kHz 18 of 33 resonance in ear occurs at 3000 Hz 19 of 33 area of oval window compared to ear drum x 20 smaller 20 of 33 hearing loss due to age all frequencys, increases as frequency increases 21 of 33 hearing loss due to noise at 4 kHz 22 of 33 ultrasound frequency 1-10 MHz 23 of 33 pulses in an ultrasound probe a few µs 24 of 33 time for an action potential 0-5 ms 25 of 33 ECG traces maxiumum voltage 1 mV 26 of 33 time for 1 PQRST wave 0.8 ms 27 of 33 action potential voltages -70 mV to +30 mV 28 of 33 diameter of a fibre of an endoscope 0.01 mm 29 of 33 α emitters Z value more than 60 30 of 33 β- emitters neutron rich 31 of 33 β+ emitters proton rich 32 of 33 Fe-56 8.7 MeV 33 of 33
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