Two children are sending signals along a cord of total mass 0.46 kg tied between tin cans with a tension of 34 N . It takes the vibrations in the string 0.54 s to go from one child to the other. How far apart are the children

6–55 refrigerant-134a enters the condenser of a residential heat pump at 800 kpa and 358c at a rate of 0.018 kg/s and leaves at 800 kpa as a saturated liquid. if the compressor consumes 1.2 kw of power, determine (a) the cop of the heat pump and (b) the rate of heat absorption from the outside air.

What does si stand for,when referring to a system of measurement

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.