When a beam of light passes at an oblique angle into a material of lower optical density, the angle of incidence is
a. greater than the angle of reflection.
b. less than the angle of reflection.
c. greater than the angle of refraction.
d. less than the angle of refraction

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.