Think about the sound waves and light waves that are transmitted when you use a computer, watch TV, or use your phone. How are these waves similar? How are they different?

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray