An artificial earth satellite is initially orbiting the earth in a circular orbit of radius r0. at a certain instant, its rocket fires for a negligibly short period of time. this firing accelerates the satellite in the direction of motion and increases its velocity by a factor of α. the change of satellite mass due to the burning of fuel can be considered negligible. 1. let e0 and e denote the total energy of the satellite before and after the firing of the rocket. find e solely in terms of e0 and α. 2. for α > αes the satellite will escape from earth. what is αes? 3. for α < αes the orbit will be elliptical. for this case, find the maximum distance between the satellite and the center of the earth, rmax, in terms of r0 and α.

b) phosphorus pentoxide

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 box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).