Alex pushes on a 2.0 kg book, resulting in a net force of 6.0 n on the book. what is the acceleration of the book?
a 3.0m/s
b 12m/s
c 24m/s
d 1.5m/s

The acceleration of the book

Explanation:

It is given that,

Mass of the book, m = 2 kg

Force acting on the book, F = 6 N

We need to find the acceleration of the book. It can be calculated using second law of motion. Force is the product of the mass of an object and its acceleration.

F = ma

So, the acceleration of the book is . Hence, this is the required solution.

they start with the same

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.