Given that earth orbits at 150,000,000 km from the sun, through what distance does earth move in a second?

First we know that Earth moves around the sun once per year.

If Radius = 150,000,000Km, then the circumference of Earth's orbit must be:

C = 2 x R x Pi

C = 2 x 150,000,000 x 3.141529

C = 942,458,700Km per year

Divide that by 365.25 days, and we get:

C = 2,580,311Km per day

Further divide that by 24 hours and we get:

C = 107,512Km / hour

There are 3600 seconds in an hour so:

C = 29.86 km / second

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.

the answer would be 32*f