In an open system, the fluid flow through the system at 17kg/s and the power developed by the system is 14000kW. The specific enthalpy of the fluid at inlet and outlet are 1200kJ/kg and 360kJ/kg respectively, and the velocities of the fluid at inlet and outlet are 60m/s and 150m/s respectively. Assuming the change in potential eneis negligible. Determine : (a). the rate at which heat is rejected from the system
(b). The area of inlet pipe , given that the specific volume of the fluid at inlet is 0.5m³/kg.​

Chapter 23, problem 075 the figure shows a geiger counter, a device used to detect ionizing radiation (radiation that causes ionization of atoms). the counter consists of a thin, positively charged central wire surrounded by a concentric, circular, conducting cylindrical shell with an equal negative charge. thus, a strong radial electric field is set up inside the shell. the shell contains a low-pressure inert gas. a particle of radiation entering the device through the shell wall ionizes a few of the gas atoms. the resulting free electrons (e) are drawn to the positive wire. however, the electric field is so intense that, between collisions with gas atoms, the free electrons gain energy sufficient to ionize these atoms also. more free electrons are thereby created, and the process is repeated until the electrons reach the wire. the resulting "avalanche" of electrons is collected by the wire, generating a signal that is used to record the passage of the original particle of radiation. suppose the radius of the central wire is 24 âµm, the inner radius of the shell 2.3 cm, and the length of the shell 14 cm. if the electric field at the shell's inner wall is 2.8 ă— 104 n/c, what is the total positive charge on the central wire?

Which of the following compounds would be primarily ionic? methane, ch4, ammonia nh3, calcium chloride, cacl2, or carbon dioxide, co2

Why should the wavelength scale of spectroscope be calibrated