To apply the principle of superposition to overlapping waves, you should of the individual waves. a) add the wavelengths b) multiply the frequencies c) add the vector displacements d) add the frequencies sound travels at a speed of 344 m/s through air at 20°c. what is the second harmonic of an open pipe of length 1.40 m filled with air at 20°c? 123 hz 246 hz 492 hz 377 hz

Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.