Which of the following are perfect squares? A. 1, 3, 5, 7,9
B. 2, 4, 6, 8, 10
C. 1, 4, 9, 16, 25
D. 1,-1,9,-9,5,-5

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation