Engineering, 16.12.2020 18:00 ultimatesaiyan
A 19000 cubic foot room initially has a radon level of 870 picocuries per cubic foot. A ventilation system is installed that brings in 500 cubic feet of air per hour that contains 7 picocuries per cubic foot, while an equal quantity of the well-mixed air in the room leaves the room each hour. Setup and use a differential equation to determine how long it will take for the room to reach a safe to breathe level of 110 picocuries per cubic foot
Answers: 3
Another question on Engineering
Engineering, 03.07.2019 14:10
If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.
Answers: 3
Engineering, 04.07.2019 08:10
Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed
Answers: 1
Engineering, 04.07.2019 18:10
Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
Answers: 3
Engineering, 04.07.2019 18:10
Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.
Answers: 2
You know the right answer?
A 19000 cubic foot room initially has a radon level of 870 picocuries per cubic foot. A ventilation...
Questions
Biology, 12.11.2019 03:31
Mathematics, 12.11.2019 03:31
Social Studies, 12.11.2019 03:31
Mathematics, 12.11.2019 03:31
Computers and Technology, 12.11.2019 03:31
History, 12.11.2019 03:31
History, 12.11.2019 03:31
Mathematics, 12.11.2019 03:31
