What is the necessary tension for a 3.25 meter rope, that has a mass of 0.250 kg, needed in order for the wave to have a frequency of 80 Hz and a wavelength of 0.80 meters? How long must the vibrating portion of a string be if it is to vibrate at its fundamental frequency of 529 Hz, if it has a string density of 0.0550 kg/m and is stretched with a tension of 8.5 Newtons? A string has a length of 0.4 m and a mass of 0.16 grams. If the tension in the string is 70 Newtons, what is the fundamental frequency? What is the frequency of the second harmonic? What is the frequency of the third harmonic?

Solve the integration : -K xp

- Figure above shows the cross section of a wall made of two layers. The thickness of the 2 nd layer is L2= 0.70L1. The thermal conductivities of the layers are 0.25 and 0.75 W/mK, respectively and thermal conduction is steady. If the temperatures at inlet and between the layers are Ti = 30.0°C and T=8 °C, respectively; what is the outside temperature To for unit area?

Thank you in advance!