Using the scientific definition of work, the most work is done on a 10-kg box when a. A forklift lifts the box straight up onto a shelf 1.5 meters high.
b. a worker pushes the box up a ramp onto a shelf 1.5 meters high.
c. a worker climbs a stepladder holding the box and places it on a shelf 1.5 meters high.
d. the work done on the box is the same in each case.

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 assestment will probley apele with cause and effect

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr