Problem: Norfolk Island:

It was announced on 19 March 2015 that self-governance for the island would be revoked by the Commonwealth and replaced by a local council with the state of New South Wales providing services to the island. A reason given was that the island had never gained self-sufficiency and was being heavily subsidised by the Commonwealth, by $12.5 million in 2015 alone. It meant that residents would have to start paying Australian income tax, but they would also be covered by Australian welfare schemes such as Centrelink and Medicare.

When did the Commonwealth of Australia announce that Norfolk Island would no longer be governed by itself?
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A: 19 March 2015


Problem: Glass:

The term mainly refers to a mix of lithium and aluminosilicates that yields an array of materials with interesting thermomechanical properties. The most commercially important of these have the distinction of being impervious to thermal shock. Thus, glass-ceramics have become extremely useful for countertop cooking. The negative thermal expansion coefficient (CTE) of the crystalline ceramic phase can be balanced with the positive CTE of the glassy phase. At a certain point (~70% crystalline) the glass-ceramic has a net CTE near zero. This type of glass-ceramic exhibits excellent mechanical properties and can sustain repeated and quick temperature changes up to 1000 °C.

What ingredients give glass-ceramics its useful thermal expansion?
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A: unanswerable


Problem: Madrasa:

Prior to the 12th century, women accounted for less than one percent of the world’s Islamic scholars. However, al-Sakhawi and Mohammad Akram Nadwi have since found evidence of over 8,000 female scholars since the 15th century. al-Sakhawi devotes an entire volume of his 12-volume biographical dictionary al-Ḍawʾ al-lāmiʻ to female scholars, giving information on 1,075 of them. More recently, the scholar Mohammad Akram Nadwi, currently a researcher from the Oxford Centre for Islamic Studies, has written 40 volumes on the muḥaddithāt (the women scholars of ḥadīth), and found at least 8,000 of them.

 How many female Islamic scholars were on record after the 1600s?
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A: unanswerable


Problem: BeiDou Navigation Satellite System:

Compass-M1 transmits in 3 bands: E2, E5B, and E6. In each frequency band two coherent sub-signals have been detected with a phase shift of 90 degrees (in quadrature). These signal components are further referred to as "I" and "Q". The "I" components have shorter codes and are likely to be intended for the open service. The "Q" components have much longer codes, are more interference resistive, and are probably intended for the restricted service. IQ modulation has been the method in both wired and wireless digital modulation since morsetting carrier signal 100 years ago.

Which components have much shorter codes and are most likely intended for the restricted service?
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A:
unanswerable