Suppose a 1,500 kg speedboat is traveling with a velocity of 13 m/s. What is the speedboat’s momentum?

19500 kgm/s

Explanation:

Mass of speedboat = 1,500 kg

Velocity = 13 m/s

speedboat’s momentum = ?

Recall that momentum is the product of the mass of an object by the velocity by which it moves.

i.e Momentum = Mass x velocity

= 1500kg x 13m/s

= 19500 kgm/s

Thus, the speedboat’s momentum is 19500 kgm/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.

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )