Kieran pushes a box with a force of 35 N. It accelerates at 5 m/s2. What is the first step that is needed to calculate the mass of the box? Identify the formula to calculate velocity.
Identify the formula to calculate force.
Identify the formula to calculate acceleration.
Identify the formula to calculate weight.

f=ma

mass of box =7kg

Explanation:

he kicked it 10 feet straight up into the air? i think this works.

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.