Families often require the services of to best meet their family needs or the specific needs of their child. a. public libraries b. community agencies c. local businesses d. community hospitals

B. Community agencies

Explanation:

Family requires the services of community agencies for meeting their family and child needs. The community agencies provide with food items, dairy items, medicines, stationary stuff, clothes required as daily needs.

a. Mass flow rate through the boiler = 5.462lbm/s

b. Power produced by the turbine = 2525.8kW

c. The rate of heat supply in the boiler = 6901.42Btu/s

d. Thermal efficiency of the cycle = 34.3%

Explanation:

In order to provide a solution, we must assume that ;

- The system is operating at a steady condition

- Kinetic and potential energy changes are negligible

Now from steam tables, we calculate specific volume and enthalpy as,

(  at )

( at )

( at & )

( & when pressure is 2psia)

Therefore,

To calculate the mass flow rate of steam in the cycle, we use the formula

where

The power output and the rate of heat addition are calculated thus,

The thermal efficiency of the cycle can be found thus;

= 34.3%