If you carry the 1 kg mass with you while running up the stairs would you be doing positive or negative work on the mass

Positive work on the mass

Explanation:

Given that,

The mass of the object, m = 1 Kg

The work done by a body is given defined as the product of force acting on the body to the magnitude of displacement.

It is given by the equation

                             W = F x S

If a person carries a weight of 1 Kg and running up the stairs, the person is doing work against the gravitational attractive force. If the person is running down the stairs, that person will be doing works towards the attractive forces.

The work done against the attractive force is positive and the work done towards the attractive force is always taken as negative.

Hence, if I carry the 1 kg mass with me while running up the stairs would be doing positive work.

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.

dang that balls went far