The graph shows the distribution of energy emitted by a star. A graph with wavelength in micrometers from 0 to 3 on the x-axis. There is intensity on the y-axis. There are 3 curves. There is a very low curve that starts at the origin, peaks at a wavelength of .9 micrometers. There is an area that starts at the x-axis and goes vertically labeled visible light.
Which is the best conclusion to draw about the star?

1. It has a lower temperature than the Sun because its peak wavelength is longer than the Sun’s.
2. It has a lower temperature than the Sun because its peak wavelength is shorter than the Sun’s.
3. It has a higher temperature than the Sun because its peak wavelength is longer than the Sun’s.
4. It has a higher temperature than the Sun because its peak wavelength is shorter than the Sun’s.

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.

momentum of soft ball three times less than baskey ball