If the size of a molecule is 20 x 10 cm. Calculate the radius of an oil drop whose base radius of its cylinder on top of water is 0.03cm. b. Define stiffness constant. Calculate the work done in an elastic material of stiffness constant 500N/m if a force of 152N is applied on it. Also calculate the extension produced​

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Rohit is trying to tune an instrument

Atomic nuclei of almost all elements consist of