QUES: The initial cost of an incandescent bulb is small compared to the cost of the energy it uses over its lifetime. Incandescent bulbs have a shorter life than most other lighting, an important factor if replacement is inconvenient or expensive. Some types of lamp, including incandescent and fluorescent, emit less light as they age; this may be an inconvenience, or may reduce effective lifetime due to lamp replacement before total failure. A comparison of incandescent lamp operating cost with other light sources must include illumination requirements, cost of the lamp and labor cost to replace lamps (taking into account effective lamp lifetime), cost of electricity used, effect of lamp operation on heating and air conditioning systems. When used for lighting in houses and commercial buildings, the energy lost to heat can significantly increase the energy required by a building's air conditioning system. During the heating season heat produced by the bulbs is not wasted, although in most cases it is more cost effective to obtain heat from the heating system. Regardless, over the course of a year a more efficient lighting system saves energy in nearly all climates.
What is more cost-effective, heat from incandescent bulbs or heat from a building's heating system?

ANS: heat from the heating system

QUES: As a child, Spielberg faced difficulty reconciling being an Orthodox Jew with the perception of him by other children he played with. "It isn't something I enjoy admitting," he once said, "but when I was seven, eight, nine years old, God forgive me, I was embarrassed because we were Orthodox Jews. I was embarrassed by the outward perception of my parents' Jewish practices. I was never really ashamed to be Jewish, but I was uneasy at times." Spielberg also said he suffered from acts of anti-Semitic prejudice and bullying: "In high school, I got smacked and kicked around. Two bloody noses. It was horrible."
When did Steven Spielberg have trouble dealing with being an Orthodox Jew?

ANS: As a child

QUES: After the 1980s, the use of the "Canadian Armed Forces" name gave way to "Canadian Forces";[citation needed] The "Canadian Armed Forces" name returned in 2013.
When did the Canadian Armed Forces name cease to be?

ANS: After the 1980s

QUES: Although Egypt was a majority Christian country before the 7th Century, after Islam arrived, the country was slowly Islamified to become a majority Muslim country. Egypt emerged as a centre of politics and culture in the Muslim world. Under Anwar Sadat, Islam became the official state religion and Sharia the main source of law. It is estimated that 15 million Egyptians follow Native Sufi orders, with the Sufi leadership asserting that the numbers are much greater as many Egyptian Sufis are not officially registered with a Sufi order.
Prior to 7th century, what was primary religion of Egypt?

ANS:
Christian