Given the following equation and dBA levels: Legf24)= 10 log ((10(し1/10) + 10(L2/10) + etc + 10(L24))/24) dBA 12am - 1am 50 1am - 2am49 2am 3am 47 3am - 4am 47 4am - 5am 49 5am 6am 57 6am - 7am 64 7am - 8am 67 8am - 9am 65 9am 10 am 66 10am- 11am 64 11am 12pm 65 12pm 1pm 66 1pm 2pm 65 2pm - 3pm 64 3pm - 4pm 65 4pm - 5pm 66 5pm 6pm 66 6pm - 7pm 65 7pm - 8pm 62 8pm 9pm 60 9pm - 10pm 59 10pm 11pm 55 11pm 12am 53 Calculate the Leą 24hr) and the Ldp.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet