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...