Assume that the sun orbits the center of the galaxy at a speed of 220 km/s and a distance of 26,000 light-years from the center.
calculate the circumference of the sun’s orbit, assuming it to be approximately circular. (remember that the circumference of a circle is given by 2πr, where r is the radius of the circle. be sure to use consistent units. the conversion from light-years to km/s can be found in an online calculator or appendix, or you can calculate it for yourself: the speed of light is 300,000 km/s, and you can determine the number of seconds in a year.)
calculate the sun’s period, the “galactic year.” again, be careful with the units. does it agree with the number we gave above?

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.

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete