When light reflects and produces a clear image, this reflection is referred to as:
a. retroreflection.
c. diffuse reflection.
b. specular reflection.
d. double reflection.
Question 2
A swimming pool heater has to be able to raise the temperature of the 30,000 gallons of water in the pool by 10.0C. How many kilowatt-hours of energy are required? (One gallon of water has a mass of approximately 3.79 kg and the specific heat of water is 4186 J/kg C.)
a. 1960 kWh
c. 1130 kWh
b. 1320 kWh
d. 216 kWh