Because the block is not moving, the sum of the y components of the forces acting on the block must be zero. Find an expression for the sum of the y components of the forces acting on the block, using coordinate system b. Express your answer in terms of some or all of the variables FnFnF_n, _f, FwFwF_w, and θθtheta.

Explanation:

The first expression ; five over six is subtracted from two whole number two over 5 and the results is multiplied by three quarter

From the diagram where Fw = the force of the gravity, Fn = the normal force, Ff = the force of friction.

since it is said that ; the block is not moving, the sum of the y components of the forces acting on the block must be zero. hence sum of y components ( summation Fy) = 0 ; Ffsinθ + Fncosθ - Fw = 0

The attached file shows the diagram

we can see how the government has failed them.

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.