(a) given that the atmospheric pressure at sea level (z = 0) is po = 1atm 1.013 x 105 pa, estimate the weight of the atmosphere above you. - [2 marks] (b) assume the same atmospheric pressure at sea level as in part (6a) and that the temperature at sea level is to = 288 k. using the hydrostatic balance dp pg dz and the ideal gas law, derive for an isothermal atmosphere (i) how pressure changes with height, (ii) how density changes with height and (iii) calculate the height at which pressure changes by a factor e compared to sea-level pressure. this height is called the scale height of the atmosphere. [8 marks] (c) now, suppose instead that temperature decreases uniformly with height. that is, t(2) to - tz, 10 k km is a constant lapse rate. where r (i) what is the thickness of the entire atmosphere in this case? (ii) how do pressure and density change with height in this atmosphere? (iii) do pressure and density change more or less rapidly with height compared to the isothermal atmosphere in part (6b)?

the answer would be c. motion and direction

i hope this : )

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.

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