Problem: Greek demonstrates several linguistic features that are shared with other Balkan languages, such as Albanian, Bulgarian and Eastern Romance languages (see Balkan sprachbund), and has absorbed many foreign words, primarily of Western European and Turkish origin. Because of the movements of Philhellenism and the Diafotismos in the 19th century, which emphasized the modern Greeks' ancient heritage, these foreign influences were excluded from official use via the creation of Katharevousa, a somewhat artificial form of Greek purged of all foreign influence and words, as the official language of the Greek state. In 1976, however, the Hellenic Parliament voted to make the spoken Dimotiki the official language, making Katharevousa obsolete.
What did these changes highlight ?
The answer is the following: emphasized the modern Greeks' ancient heritage

Problem: While inert gas reduces filament evaporation, it also conducts heat from the filament, thereby cooling the filament and reducing efficiency. At constant pressure and temperature, the thermal conductivity of a gas depends upon the molecular weight of the gas and the cross sectional area of the gas molecules. Higher molecular weight gasses have lower thermal conductivity, because both the molecular weight is higher and also the cross sectional area is higher. Xenon gas improves efficiency because of its high molecular weight, but is also more expensive, so its use is limited to smaller lamps.
How does the molecular weight of a gas relate to thermal conductivity?
The answer is the following: Higher molecular weight gasses have lower thermal conductivity

Problem: CSL, one of the world's top five biotech companies, and Sigma Pharmaceuticals have their headquarters in Melbourne. The two are the largest listed Australian pharmaceutical companies. Melbourne has an important ICT industry that employs over 60,000 people (one third of Australia's ICT workforce), with a turnover of $19.8 billion and export revenues of $615 million. In addition, tourism also plays an important role in Melbourne's economy, with about 7.6 million domestic visitors and 1.88 million international visitors in 2004. In 2008, Melbourne overtook Sydney with the amount of money that domestic tourists spent in the city, accounting for around $15.8 billion annually. Melbourne has been attracting an increasing share of domestic and international conference markets. Construction began in February 2006 of a $1 billion 5000-seat international convention centre, Hilton Hotel and commercial precinct adjacent to the Melbourne Exhibition and Convention Centre to link development along the Yarra River with the Southbank precinct and multibillion-dollar Docklands redevelopment.
In 2008, Melbourne overtook what city with the amount of money that domestic tourists spent in the city?
The answer is the following: Sydney

Problem: During World War II, the development of the anti-aircraft proximity fuse required an electronic circuit that could withstand being fired from a gun, and could be produced in quantity. The Centralab Division of Globe Union submitted a proposal which met the requirements: a ceramic plate would be screenprinted with metallic paint for conductors and carbon material for resistors, with ceramic disc capacitors and subminiature vacuum tubes soldered in place. The technique proved viable, and the resulting patent on the process, which was classified by the U.S. Army, was assigned to Globe Union. It was not until 1984 that the Institute of Electrical and Electronics Engineers (IEEE) awarded Mr. Harry W. Rubinstein, the former head of Globe Union's Centralab Division, its coveted Cledo Brunetti Award for early key contributions to the development of printed components and conductors on a common insulating substrate. As well, Mr. Rubinstein was honored in 1984 by his alma mater, the University of Wisconsin-Madison, for his innovations in the technology of printed electronic circuits and the fabrication of capacitors.
What award did Rubinstein win in 1984 for his contributions?
The answer is the following:
Cledo Brunetti Award