Show all work an infinitely long, solid cylindrical charge insulator of radius r carries a volumetric charge density of p in electrostatic equilibrium. a) draw an appropriate gaussian surface for inside the cylinder. label r and r. b) draw an appropriate gaussian surface for outside the cylinder. label r and r c) derive an equation for the electric field as a function of the radial position inside the cylinder using electric flux and a gaussian surface of variable radius. d) derive an equation for the electric field as a function of the radial position outside the cylinder e) multiply your result from part b with some test charge. is this result consistent with coulomb's law? (consider when coulomb's law applies.) f) sketch a graph of your electric field as a function of radius from parts a and b. g) redraw the graph if it was a conductor of the same shape and size, carrying the same total charge.

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.

current flows in a wire

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.