Engineering, 25.09.2020 03:01, ushayuri
Wearing layers of clothing in cold weather is often recommended because dead-air spaces between the layers keep the body warm by reducing the heat loss from the body. Compare the rate of heat loss for a single, 13 mm thick layer of wool to three 3 mm thick layers separated by 2 mm air gaps. Since the air gaps are so small, treat the air as stationary (i. e., assume heat is being conducted through the air gaps). Use kwool = 0.07 W/m-K and kair = 0.02 W/m-K.
Answers: 2
Engineering, 04.07.2019 18:10, ahmedeldyame
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.
Answers: 1
Wearing layers of clothing in cold weather is often recommended because dead-air spaces between the...
Mathematics, 29.01.2020 06:41
Mathematics, 29.01.2020 06:41
Mathematics, 29.01.2020 06:41