Which of the following most likely has neither a fixed shape nor a fixed volume? a) neon gas b) solid copper c) liquid nitrogen d) liquid mercury

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Which feature indicates that mars resides in the inner region of the solar system

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.