M on a frictionless track collides and sticks to a 4.0 kg wagon moving left
A 6.0 kg wagon moving right at 3.0
m
at 12
What is the final speed of the wagons?
Consider rightward as the positive direction.
Round answer to two significant digits.

Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)