HRM 3400 Lecture Notes - Lecture 3: United Nations Scientific Committee On The Effects Of Atomic Radiation, Heat Cramps, Dry Cleaning
Document Summary
The basis of operations and existence depends on the principles of physics. Types of energy defined by distance, mass and/or time. Most health effects are chronic in nature, resulting damage can take years to manifest itself. Radiation (ionizing and non-ionizing: 1 million in compensation cost between 1995 and 2004. If (cid:455)ou ha(cid:448)e a hea(cid:396)i(cid:374)g lost, that (cid:449)o(cid:374)"t stop (cid:455)ou f(cid:396)o(cid:373) (cid:449)o(cid:396)ki(cid:374)g. Travels through air in a wave pattern called a sine wave. Wavelength the distance that 1 complete sine wave cycle will travel. # of times/second that a complete sine wave is repeated. Expressed in units of hertz (hz) or cycles/second. The lower the sound (pitch) the lower the frequency. Range that the human ear can hear is 20 to 20,000 hz. F = (cid:3046)=(cid:3050)(cid:3049)(cid:3032)(cid:3032)(cid:3041)(cid:3047) (cid:3046)(cid:3032)(cid:3030)(cid:3042)(cid:3041)(cid:3031)(cid:3046) = (cid:3030)(cid:3030)(cid:3032)(cid:3046) (cid:3046)(cid:3032)(cid:3030)(cid:3042)(cid:3041)(cid:3031)(cid:3046)= . Threshold of hearing envelop or range of sound that the human ear can perceive or hear (20 20,000 hz) Measure of noise uses the decibel (db) logarithmic scale.