The majority of x-rays produced by dental x-ray machines are formed by:
a. Characteristic radiation
b. Radionuclide decay
c. Bremsstrahlung radiation
d. Coherent scattering
c. The majority of x-rays produced by dental x-ray machines are formed by general/bremsstrahlung radiation which is produced when electrons are accelerated across the tube head and abruptly stop against the tungsten target.
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All of the following are functions of thrombin except:
a. Activates factors V and VIII b. Activates plasminogen c. Activates factor XIII d. Initiates platelet aggregation
Baddeley and Longman (1978) compared various massed and distributed training schedules for training postal workers and found the worst schedule for learning to be:
A. 2-hour sessions twice a day for 3 weeks B. 2-hour sessions once a day for 6 weeks C. 1-hour sessions once a day for 12 weeks D. 1-hour sessions twice a day for 6 weeks