A golfer hits a 0.050 kg golf ball, giving it a speed of 78 m/s. What is the impulse imparted to the golfball?

3.9kgm/s

Explanation:

Given parameters:

Mass of the golf  = 0.05kg

Speed  = 78m/s

Unknown:

Impulse imparted to the golfball  = ?

Solution:

Impulse is the change in momentum of a body;

  Impulse  = m (v  - u)

m is the mass

v is the final speed

u is the initial speed  = 0m/s

So;

         Impulse  = 0.05 (78 - 0) = 3.9kgm/s

wavelength variability is the right one

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.