Aspeaker is designed for wide dispersion for a high frequency sound. what should the diameter of the circular opening be in a speaker where the desired diffraction angle is 75° and a 9100 hz sound is generated? the speed of sound is 343 m/s

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.