Two carts with masses of 12.7 kg and 2.3 kgmove in opposite directions on a frictionless horizontal track with speeds of 6.5 m/s and2.7 m/s, respectively. The carts stick together after colliding head-on. Find their final speed. Answer in units of m/s.

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.