Recent content by keighley

Homework Statement I have been asked to answer the following: The function (x^3)+(y^3)-(2x^2)-(2y^2)+(3xy) has two stationary values. Determine their co-ordinates and their nature. Homework Equations The Attempt at a Solution Sorry I am stuck.

Yes I saw the missing characters after I posted it. I worked it out after I posted the message. I have the answer at work so I will post it and how I got it later.

Homework Statement A loudspeaker of 30cm diameter vibrates at 2kHz. Given that the pressure generated is 55.1N/m2, determine the displaced amplitude. Assume air density is 1.59kg/m3 and that the speed of sound is 340m/s. I have been told that the dimensions given for the loadspeaker is...