Three balls with masses of 1.0 kg, 1.0 kg, and 4.0 kg are located at coordinates (8.0m,6.0m), (7.5m,5.0m), and (2.5m,4.5m), respectively, and are connected by massless rods.1.what is the x-coordinate of the center of mass? 2.for the three balls above, what is the y-coordinate of the center of mass?

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.