The only way to truly test if a variable is undefined is to do the following. Remember, undefined is an object in Javascript. To determine if a variable or object property exists, It is good to compare to keyword undefined or you can also check the type of the object to string âundefinedâ. In the following JavaScript code we compare the num to the undefined in both way.
Nuclear waste -- The waste from nuclear power plants will be toxic for humans for more than 100,000 years. Itâs untenable now to secure and store all of the waste from the plants that exist. To scale up to 2,500 or 3,000, let alone 17,000 plants is unthinkable.
a benefit to using nuclear fission power is that it. supplies a lot of electricity, conserves organic fuels, like oil, coal and wood, eleiminates huge quantifies of sulfur oxides, which pollute our air. the release of energy in nuclear fission is consistent with the fact that uranium has. more mas per nucleon than either of the two fragments. a breeder reactor is more efficient than a convertional nuclear fission reactor in that.