Question: Film speed is used in the exposure equations to find the appropriate exposure parameters. Four variables are available to the photographer to obtain the desired effect: lighting, film speed, f-number (aperture size), and shutter speed (exposure time). The equation may be expressed as ratios, or, by taking the logarithm (base 2) of both sides, by addition, using the APEX system, in which every increment of 1 is a doubling of exposure; this increment is commonly known as a "stop". The effective f-number is proportional to the ratio between the lens focal length and aperture diameter, the diameter itself being proportional to the square root of the aperture area. Thus, a lens set to f/1.4 allows twice as much light to strike the focal plane as a lens set to f/2. Therefore, each f-number factor of the square root of two (approximately 1.4) is also a stop, so lenses are typically marked in that progression: f/1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, etc.
Is there an answer to this question: What variables help the photographer produce the desired effect?

Answer: lighting, film speed, f-number (aperture size), and shutter speed (exposure time)

Question: Unveiled in 1888, Royal Arsenal's first crest featured three cannon viewed from above, pointing northwards, similar to the coat of arms of the Metropolitan Borough of Woolwich (nowadays transferred to the coat of arms of the Royal Borough of Greenwich). These can sometimes be mistaken for chimneys, but the presence of a carved lion's head and a cascabel on each are clear indicators that they are cannon. This was dropped after the move to Highbury in 1913, only to be reinstated in 1922, when the club adopted a crest featuring a single cannon, pointing eastwards, with the club's nickname, The Gunners, inscribed alongside it; this crest only lasted until 1925, when the cannon was reversed to point westward and its barrel slimmed down.
Is there an answer to this question: After the team moved to what city were the cannon left off the crest?

Answer: Highbury

Question: The tide-predicting machine invented by Sir William Thomson in 1872 was of great utility to navigation in shallow waters. It used a system of pulleys and wires to automatically calculate predicted tide levels for a set period at a particular location.
Is there an answer to this question: What did Sir William Thomson's tide-predicting machine use to function?

Answer: system of pulleys and wires

Question: Kerry is a Roman Catholic, and is said to carry a religious rosary, a prayer book, and a St. Christopher medal (the patron saint of travelers) when he campaigned. While Kerry is personally against abortion, he supports a woman's legal right to have one. Discussing his faith, Kerry said, "I thought of being a priest. I was very religious while at school in Switzerland. I was an altar boy and prayed all the time. I was very centered around the Mass and the church." He also said that the Letters of Paul (Apostle Paul) moved him the most, stating that they taught him to "not feel sorry for myself."
Is there an answer to this question: Which part of the Bible did Kerry find the most moving?

Answer:
the Letters of Paul