Explain how to design elevator doors within an elevator system, the components that will be used and their position in the design, all the requirements for the design and construction. use diagram if you can, position of the motor, pulley etc (the door is a centre parting door with two panels)

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m