A car has a distance between axles of 6.2 m and a center of mass located 2.2 m from the front axle. What is the ratio of the weights indicated by a scale when only the front axle is on the scale versus when only the rear axle
is on the scale?
Select one:
O a. W front axles / Wirear axle) = 1.62
O b. Wifront axles / Wirear axle)
1.93
O c. W front axe) / Wirear asse) =
1.81
1/ We
O d. Wifront axle
(rear axle) = 2.06

The correct option is  C

Explanation:

From the question we are told that

    The distance between axles of the car  is  

     The position of the car's center of mass is  

Now  we can evaluate the distance of the center of mass to the rear axle as follows

substituting values

assuming the car is   at equilibrium,  taking moment about the center of mass

=>        

=>      

substituting values

                  Note [ is the front axle weight  and  

                                                      is the rear axle weight  ]

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.

i guess it’s a and b