Pls help. I will mark whoever helps me out brainliest. Which of the following sounds has the lowest frequency?*

A. A female soprano singer at 2,000 hertz

B. A male voice at 500 hertz

C. The rumble of thunder at 75 hertz

Which feature of a heating curve indicates a change ofn state

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Decreased sensitivity to an unchanging stimulus is known as