In 1902, the Siemens company developed a tantalum lamp filament. These lamps were more efficient than even graphitized carbon filaments and could operate at higher temperatures. Since tantalum metal has a lower resistivity than carbon, the tantalum lamp filament was quite long and required multiple internal supports. The metal filament had the property of gradually shortening in use; the filaments were installed with large loops that tightened in use. This made lamps in use for several hundred hours quite fragile. Metal filaments had the property of breaking and re-welding, though this would usually decrease resistance and shorten the life of the filament. General Electric bought the rights to use tantalum filaments and produced them in the US until 1913.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What had a higher resistivity than carbon?
Ah, so.. unanswerable

In Australia, the Prime Minister is expected to step down if s/he loses the majority support of his/her party under a spill motion as have many such as Tony Abbott, Julia Gillard and Kevin Rudd.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What motion requires the head of State to step down in Australia?
Ah, so.. unanswerable

The system displays the What's New screen by default instead of the [Games] menu (or [Video] menu, if a movie was inserted) when starting up. What's New has four sections: "Our Pick", "Recently Played", latest information and new content available in PlayStation Store. There are four kinds of content the What's New screen displays and links to, on the sections. "Recently Played" displays the user's recently played games and online services only, whereas, the other sections can contain website links, links to play videos and access to selected sections of the PlayStation Store.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many  different sections does What's New have?
Ah, so..
four