Apassenger on a jet plane is wondering why the flight times on her ticket are so different. her flight from los angeles to boston took five hours and 20 minutes; however, her return flight from boston back to los angeles takes nearly six hours. how can you explain the difference to this passenger?

as she travels from la to boston, she will be traveling against the gulf stream so the flight speed will be slower.

as she travels from boston to la, she will be traveling against the jet stream so her flight time will be longer.

as she travels from boston to la, she will be traveling with the jet stream so her travel time will be longer.

her plane has been delayed.

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.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.