Arock climber is about to haul up 100 n (about 22.5 lb) of equipment that has been hanging beneath her on 40 m of rope weighing 0.8 n/m. how much work will it take to lift all this? ? 8) a vertical cylindrical tank measures 30 ft high and 20 ft in diameter. it is full of kerosene weighing 51.2 lb/ft. how much work (ft-lb) does it take to pump the kerosene to the level of the top of the tank (i. e to pump all the kerosene out the top of the tank).

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.

it breaks and dirupture other materials and other sencews from the bottom