9.85 air at 26 kpa, 230 k, and 220 m/s enters a turbojet engine in flight. the air mass flow rate is 25 kg/s. the compressor pressure ratio is 11, the turbine inlet temperature is 1400 k, and air exits the nozzle at 26 kpa. the diffuser and nozzle processes are isentropic, the compressor and turbine have isentropic efficiencies of 85% and 90%, respectively, and there is no pressure drop for flow through the combustor. kinetic energy is negligible everywhere except at the diffuser inlet and the nozzle exit. on the basis of air-standard analysis, determine (a) the pressures, in kpa, and temperatures, in k, at each principal state. (b) the rate of heat addition to the air passing through the combustor, in kj/s. (c) the velocity at the nozzle exit, in m/s.

What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones

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?

How many times did thomas edison mess up the light bulb