Atraditional unit of length in japan is the ken (1ken =1.97 m) . what are the ratios of (a) square kens to a square meters? and (b) cubic kens to cubic meters? what is the volume of a cylindrical water tank of a height 5.50 kens and radius of 3.0 kens in (c) cubic kens and (d) cubic meters?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

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.