g Water at 25C, 20 bar is heated under constant pressure. a) Determine the final state if the amount of heat is 500 kJ/kgb) Determine the final state if the amount of heat is 1500 kJ/kgc) Determine the final state if the amount of heat is 3000 kJ/kg

Explanation:

Given that:

At the inlet:

Temperature

Pressure = 20bar = 2000 kPa

At the outlet:

a)

Q = 500 kJ/kg

Using the steam tables to determine the properties of water;

b)

Thus, the outlet steam will be a vapor-liquid mixture at 212.38° C

c)

Thus, the outlet steam will be a superheated vapor at 380° C

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

answer: a. same unit

explanation: