Agas expands through a convergent-divergent nozzle at a rate of 181 kg/min to an actual temperature of 221 °c. the nozzle efficiency is 89%, while the throat pressure is 1 581 kpa. the isentropic temperature drop through the nozzle is 298 °c. take gamma for air as 1,4 and r for air as 0,288 kj/kg. k. ignore the velocity of the gas at the inlet and calculate the following quantities: at the nozzle inlet: 5.1 the absolute temperature of the gas 5.1.1 the pressure of the gas in kpa 5.1.2 (2 x 3) (6) 5.2 the value of cp for the gas (3) at the throat of the nozzle: 5.3 the absolute temperature of the gas 5.3.1 (2) 5.3.2 (2) the velocity of the gas in m/s (3) 5.3.3 the specific volume of the gas 5.4 at the nozzle exit: 5.4.1 the absolute isentropic temperature of the gas 5.4.2 the velocity of the gas in m/s

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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it would be d. henry moseley

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since electrons are negative the answer is neagtaive

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.