A cop is traveling at a velocity of 24.17 m/s when he is passed by a speeding car traveling at a velocity of 40.29 m/s and accelerating uniformly at 1.77 m/s^2 At the moment the speeding car passes him, the cop accelerates uniformly at 3.31 m/s^2. How long does the cop take to catch up to the speeding car?
1. 11.368 s
2. 23.761 s
3. 20.935 s
4. 26.127

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.

falling water hydro = water .. spectcular places these plants are

statement #3 on andre"s list is false.

k2s for potassium sulphide