Context and question: One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights or lanterns (chromacity and luminance standards being set under the Convention on the International Regulations for Preventing Collisions at Sea 1972, Annex I and the CIE) and LED-based Christmas lights. In cold climates, LED traffic lights may remain snow-covered. Red or yellow LEDs are used in indicator and alphanumeric displays in environments where night vision must be retained: aircraft cockpits, submarine and ship bridges, astronomy observatories, and in the field, e.g. night time animal watching and military field use.
What type of light is not ideal for traffic signals?
Answer: unanswerable
Context and question: Following the 2007 Federal Election, Dr Brendan Nelson was elected leader by the Parliamentary Liberal Party. On 16 September 2008, in a second contest following a spill motion, Nelson lost the leadership to Malcolm Turnbull. On 1 December 2009, a subsequent leadership election saw Turnbull lose the leadership to Tony Abbott by 42 votes to 41 on the second ballot. Abbott led the party to the 2010 federal election, which saw an increase in the Liberal Party vote and resulted in the first hung parliament since the 1940 election.
How close was the race between Turnbull and Abbott in 2008?
Answer: unanswerable
Context and question: The USAF countered the MiG-15 by sending over three squadrons of its most capable fighter, the F-86 Sabre. These arrived in December 1950. The MiG was designed as a bomber interceptor. It had a very high service ceiling50,000 feet (15,000 m) and carried very heavy weaponry: one 37 mm cannon and two 23 mm cannons. They were fast enough to dive past the fighter escort of P-80 Shooting Stars and F9F Panthers and could reach and destroy the U.S. heavy bombers. B-29 losses could not be avoided, and the Air Force was forced to switch from a daylight bombing campaign to the necessarily less accurate nighttime bombing of targets. The MiGs were countered by the F-86 Sabres. They had a ceiling of 42,000 feet (13,000 m) and were armed with six .50 caliber (12.7 mm) machine guns, which were range adjusted by radar gunsights. If coming in at higher altitude the advantage of engaging or not went to the MiG. Once in a level flight dogfight, both swept-wing designs attained comparable maximum speeds of around 660 mph (1,100 km/h). The MiG climbed faster, but the Sabre turned and dived better.
To mitigate the loses of the B-29, what did the US Air Force do?
Answer:
switch from a daylight bombing campaign to the necessarily less accurate nighttime bombing