Superconductivity is lost when a certain critical temperature is exceeded.

What is the speed of sound in the air inside a furnace where the temperature is 500 degrees Celsius (773 Kelvin)? (Type your final answer with units in the box below. Show your equation and work on your scratch paper, or include it in the box below.)

An electric motor on an airplane operates on 24 volts and draws a current of 15 amperes. (a) What is the power consumption of the motor? (b) How much energy does the motor use during a 2 hour flight? (Type your final answer with units in the box below. Show your equation and work on your scratch paper, or include it in the box below.)

EM waves in a vacuum travel at a speed __________. (Select all that apply.)

An example of a longitudinal wave is __________. (Select all that apply.)

Why do we use fuses and circuit breakers?

Choose ALL that apply. Of the following, what condition(s) may contraindicate or require modifications to the RDHs ability to carry out / implement dental hygiene services?

Which of the following would be LEAST helpful to the patient in cleaning the area with this fixed retainer device?  ex 2 retainer.jpg

Case #2 – Your patient is a 21-year-old male presenting for an appointment 16 months after his last appointment. He has no significant findings on his health history. He has sealants on all of his first molars and a veneer on tooth #9. There is a grayish ‘shadow’ to the occlusal surface of #31 and obvious cavitation to the occlusal of #18. You note generalized heavy biofilm deposits, especially at the cervical margin of the maxillary anterior teeth.Question: The gray lesion on #31 is most likely:

Which of the following is NOT preferred as a method or technique for performing a hard tissue assessment?