Answer:
11700j
Explanation:
add the two because the plate has to maintain the temp.
2700+9000=11700
Answer:
diffraction
Explanation:
diffraction occurs when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands
40 dB is 20 dB more power than 20 dB is. 20 dB more means 100 times as much.
