In order to satisfy as many wants as possible, it is necessary to achieve PRODUCTIVE efficiency

Hello some parts of your question is missing below is missing part

In order to satisfy as many wants as possible, it is necessary to achieve productive efficiency

(multiple choice)

because otherwise resources are idle.

because producing more of one thing also leads to producing more of another.

because otherwise output may go to where it is less valued.

answer : because otherwise resources are idle.

Explanation:

In order to satisfy as many wants as possible it is necessary to achieve productive efficiency and productive efficiency is when resources are used to its full potential to manufacture a product or service and during this process very few resources will be left idle. also when productive efficiency is achieved ; marginal cost = average cost of the manufacturing

c.the charges if the proton and electron and gravity

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.