First it is converted to heat. This will then usually drive some variation of a steam engine.
yes
Typically the nuclear energy is converted to electricity and the electricity powers the device. No much differently than the chemical energy in fossil fuels is often converted to electricity and the electricity powers the device.
nuclear fission
Not directly, but in when converted into electricity, yes.
the nuclear reactor makes steam wich drives turbines wich drive generators that make the electricity
yes it is..or else it couldn't be used
Heat. Which is used to boil water which turns a turbine. The turbine generates electricity.
Nuclear fission is converted into electricity through the following: Nuclear fission; that is the splitting of heavy nuclei (as U-235) when bombarded by neutrons; results in loss of mass (or mass defect) that transforms into energy according to formula E = mc2 (c is light velocity). The resulting energy manifests itself as heat energy that produces steam. The steam spins the turbines that spins electric generators and hence producing electricity.
Nuclear energy is obtained by the fissioning of nuclei of uranium235, in a controlled chain reaction in a nuclear reactor, which produces heat that can be converted to electricity by normal power plant methods.
nuclear is a type of electricity
Spacecraft using nuclear power use the heat energy of Plutonium-238. The heat energy of the radioactive pellet of Plutonium-238 is converted into electricity.
Your question is slightly off. You could ask how much energy plutonium has, since plutonium can be used as a fuel to run a nuclear power plant and to generate electricity (although the usual use of plutonium is to make atomic bombs - the normal fuel in nuclear power plants us uranium, not plutonium) but the element itself contains potential nuclear energy, not electricity. Nuclear energy can be converted into electricity. I will also note that it is can't be converted directly into electricity. It can be converted into heat, and the heat can be used to boil water to run a steam turbine which then generates electricity. In terms of usable energy content, I am not going to give you an exact equivalence, but it is possible to create something like a 50 kiloton explosion (one equal to the explosive force of 50,000 tons of dynamite) with about 30 pounds of plutonium. So it contains a lot of energy.