Answer:
d
Explanation:
Beryllium copper combines high strength with non-magnetic and non-sparking qualities. It has excellent metalworking, forming and machining properties. It has many specialized applications in tools for hazardous environments, musical instruments, precision measurement devices, bullets, and aerospace.
Answer:
For this system to be efficient, the surfaces above the luminous ceiling must be white, so that all the light been transmitted is reflected.
Explanation:
White surfaces reflect light at almost 100% efficiency, this ensures that non of the light been transmitted is absorbed.
Thus, if one type of illumination system consists of rows of strip fluorescents and a ceiling that will transmit light. For this system to be efficient, the surfaces above the luminous ceiling must be white so that all the light been transmitted is reflected.
D) O Water - Based Is the 1000000000000000000% correct answer