Three strings are attached to a small metal ring, two of the strings make an angle of 30 degrees with the vertical and each is pulled with a force of 10 newton. what force must be applied to the third string to keep the string steady​

Amplitude is a measure of a waves a; speed b; distance c; energy d; frequency

What is the difference between electrically neutral objects and electrically charged objects

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.