Question:
James Watt (30 January 1736 (19 January 1736 OS) - 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world. While working as an instrument maker at the University of Glasgow, Watt became interested in the technology of steam engines. He realised that contemporary engine designs wasted a great deal of energy by repeatedly cooling and reheating the cylinder. Watt introduced a design enhancement, the separate condenser, which avoided this waste of energy and radically improved the power, efficiency, and cost-effectiveness of steam engines.
From an early age Watt was very interested in chemistry. In late 1786, while in Paris, he witnessed an experiment by Berthollet in which he reacted hydrochloric acid with manganese dioxide to produce chlorine. He had already found that an aqueous solution of chlorine could bleach textiles, and had published his findings, which aroused great interest among many potential rivals. When Watt returned to Britain, he began experiments along these lines with hopes of finding a commercially viable process. He discovered that a mixture of salt, manganese dioxide and sulphuric acid could produce chlorine, which Watt believed might be a cheaper method. He passed the chlorine into a weak solution of alkali, and obtained a turbid solution that appeared to have good bleaching properties. He soon communicated these results to James McGrigor, his father-in-law, who was a bleacher in Glasgow. Otherwise he tried to keep his method a secret. With McGrigor and his wife Annie, he started to scale up the process, and in March 1788, McGrigor was able to bleach 1500 yards of cloth to his satisfaction. About this time Berthollet discovered the salt and sulphuric acid process, and published it so it became public knowledge. Many others began to experiment with improving the process, which still had many shortcomings, not the least of which was the problem of transporting the liquid product. Watt's rivals soon overtook him in developing the process, and he dropped out of the race. It was not until 1799, when Charles Tennant patented a process for producing solid bleaching powder (calcium hypochlorite) that it became a commercial success. By 1794 Watt had been chosen by Thomas Beddoes to manufacture apparatus to produce, clean and store gases for use in the new Pneumatic Institution at Hotwells in Bristol. Watt continued to experiment with various gases for several years, but by 1797 the medical uses for the "factitious airs" had come to a dead end.
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was he successful in this?

Answer:
Watt continued to experiment with various gases for several years, but by 1797 the medical uses for the "factitious airs" had come to a dead end.

Question:
Nina Tucker is a fictional character from the Australian soap opera Neighbours, played by Delta Goodrem. She made her first screen appearance during the episode broadcast on 11 June 2002. Goodrem was approached by producers after they saw her video for her debut single. Goodrem, who had just signed a record deal, almost turned down the role of Nina as she felt the character did not suit her style of music.
Neighbours approached Goodrem about appearing in the show after they saw the video for her debut single, "I Don't Care"; she was offered the role of Nina Tucker in early 2002. Goodrem almost turned down the part because she was not happy with the character written for her. She had just signed a record deal with Sony Records and felt the part did not suit her music. The Neighbours producers agreed to rewrite the role of Nina for her. In July 2003, Goodrem was diagnosed with Hodgkin's lymphoma and was forced to leave the show to begin treatment. Goodrem was written out of Neighbours, and script producer, Luke Devenish, said: "She had to concentrate on her health, so there was no getting around it. There was absolutely no question of attempting to keep her working." Nina departed in October 2003, with an exit storyline that allowed for a return in the future. Three months' worth of scripts were rewritten, and a new character, Carmella Cammeniti (Natalie Blair), was created and introduced to cover Nina's planned storyline with Connor O'Neill (Patrick Harvey). In March 2004, it was announced that Goodrem would be returning to Neighbours to finish her contract. Of her return, a spokesperson said "We never thought we'd see her back. Her illness stunned us all and her vastly improved health now thrills us. We can't wait for the days she's back on the set. This is where it all started for her." Goodrem told TV Week that it was important to her to tie up Nina's storylines and added: "I really felt that Nina and myself had a lot of unfinished business there." Due to Goodrem's busy schedule, the producers made sure all her scenes were shot in three days. She returned to screens in Australia on 6 September. Goodrem was one of many ex-cast members who returned to Neighbours in 2005 for an episode that celebrated the 20th anniversary of the show. Goodrem said that she "couldn't be happier" about going back to Neighbours.
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Was she ever able to return?

Answer:
In March 2004, it was announced that Goodrem would be returning to Neighbours to finish her contract.