A2000 hz siren and a civil defense official are both at rest with respect to the ground. what frequency does the official hear if the wind is blowing at 12 m/s (a) from source to official and (b) from official to source?

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

More solar radiation is absorbed by earth’s surface than by