Imagine that you are located on Earth while a spaceship travels from Earth to the star Vega at constant velocity of 0.8c.
The following items describe quantities that, according to Einstein’s special theory of relativity, would be either larger (or longer), smaller (or shorter), or the same as their rest values. (Note that by "rest value," we mean the value you would find if both you and the spaceship were at rest on Earth.)

Match each item to the correct category.

1) one second on your clock as seen by spaceship passengers
2) one second on a spaceship clock as seen by you
3) speed of the spaceship's headlight as measured by you
4) mass of spaceship as measured by you
5) distance to Vega as measured by spaceship passengers
6) length (in the direction of motion) of the spaceship as measured by you
7) your mass as measured by spaceship passengers

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.

0.19 m/s and 0.45 m/s

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!

elctricity and magnet is conversion to it