Apiano emits frequencies the range from a low of about 28 hz to a high of about 4200 hz. find the range of wavelengths in air attained by this instrument when the speed of sound in air us 340 m/s.

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

If forces acting on an object are unbalanced. true or false