un camión de carga de 15000kg está viajando por una ´pista plana a 5.00 m/s. Subitamente, se deja caer dentro del camión 5000 kg de carbón. La velocidad del carbón en la dirección horizontal es cero. Encuéntrese la rapidez final del camión

3,75 m/s

Explanation:

15000 kg . 5 m/s = (15000 + 5000) kg . V

V = 75000 kg m/s / 20000 kg = 3,75 m/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.

radiation

explanation:

heat is transmitted by radiation