Carmen and judi dock a canoe. 77.0-kg carmen moves forward at 4.7 m/s as she leaves the canoe to step onto the dock. at what speed and in what direction do the canoe and judi move if their combined mass is 115 kg.

3.15m/s

Explanation:

Conservation of momentum

M1V1=M2V2

77kg*4.7m/s=115kg*V2

So therefore, V2=77kg*4.7m/s/115kg

=3.15m/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.

the amount of current in the coil