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Physics
Health Physics
Question | Answer |
---|---|
what property changes in a liquid-in-glass thermometer | Volume of Liquid |
what property changes in a digital thermometer | resistance of thermometer |
what property changes in a crystal strip thermometer | crystals have different melting points |
what property changes in a rotary thermometer | different rates of expansion in bimetallic strip |
what property changes in a thermocouple thermometer | voltage produced |
why use a clinical thermometer to measure body temperature | because it has a smaller more accurate range |
what is normal body temperature | 37 degrees celsius |
what does a person have if they are over 38 degrees celsius | a fever |
what does a person have if they are bellow 34 degrees celsius | hypothermia |
what is a stethoscope | a device used to listen to sounds from within the body |
what is ultrasound | sound with a frequency above 20,000 Hz |
what unit do we use to measure noise levels | Decibels (dB) |
what is the noise level of a normal conversation | 60dB |
what is sound caused by | vibrations |
what is refraction | the change in speed of light as it passes one material to another |
what is focal length | the distance between a lens and the point where parallel rays of light are brought to a focus |
what lens would you use for short sight | concave lens |
what lens would you use for long sight | convex lens |