The pressure inside a bottle of champagne is 2.5 atm higher than the air pressure outside. the neck of the bottle has an cross sectional area of 3.0 cm^2. what is the frictional force on the cork due to the neck of the bottle?

To solve this problem it is necessary to apply the concepts related to Pressure, Strength and Area.

We know by definition that Pressure is the amount of Force expressed per unit area, that is,

Where,

F = Force

A = Cross-sectional Area

The net pressure on the bottle would be given by the difference between the internal pressure and the atmospheric pressure, therefore

The given radio is,

Hence the Cross-sectional Area would be

Applying the equation for Pressure we have that

Therefore the frictional force on the cork due to the neck of the bottle is 429.66N.

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.

area of focus