What is non-ionizing radiation? Name four types
What will be an ideal response?
Nonionizing radiation is that radiation on the electromagnetic spectrum that has a frequency (hertz, cycles per second) of 1015 or less and a wavelength in meters of 3 H 107 or less. This encompasses visible, ultraviolet, infrared, microwave, radio, and AC power frequencies. Radiation at these frequency levels does not have sufficient energy to shatter atoms and ionize them. However, such radiation can cause blisters and blindness. In addition, there is mounting evidence of a link between nonionizing radiation and cancer. The greatest concerns about nonionizing radiation relate to the following sources: visible radiation, radio frequency/microwave radiation, and extremely low frequency radiation, ultraviolet radiation, infrared radiation, radio frequency/microwave radiation, extremely low frequency radiation, and lasers.
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Indicate whether the statement is true or false
Degrees, minutes, and ____________________ are used for angular measurements in both the English and metric systems.
Fill in the blank(s) with the appropriate word(s).
To finish a splice and ensure complete protection, it should be covered with how many layers of vinyl electrical tape?
a. One b. Two c. Three d. Four
Carry the answer to two decimal places. A certain type of cable weighs 500.88 pounds per one thousand feet. Determine the weight of 53 feet of this cable. Round the answer to the nearest hundredth.
Fill in the blank(s) with the appropriate word(s).