The average monthly income of 10,000 people in a Smart city is found to be Normally distributed with mean Rs 75,000 and standard deviation of Rs 15,000 i. If 9% are considered as the poorest in this city find the minimum income of the remaining rich people. ii. If 23% are considered as the richest find the minimum income of the richest people.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.