An area of an interconnected 50 hz power system has two turbine- generator units rated at 500 and 1000 mva. the regulation constant of the units is 0.05 per unit based on their ratings. each uni is initially operating at 50% of its own rating when the load suddenly increases by 250 mw. assume that the reference power setting of each turbine-governor remains constant. neglect losses and the dependence of load on frequency. determine: (i) the unit area frequency response characteristic on a 100 mva q3. (a) base. (i) the steady-state change in area frequency in hz. (iii) the change in mechanical power output of each turbine in mw 30% (b) list and briefly describe five methods to improve power system stability. 25%

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.