Context and question: The photoelectric effect is the emission of electrons (called "photoelectrons") from a surface when light is shone on it. It was first observed by Alexandre Edmond Becquerel in 1839, although credit is usually reserved for Heinrich Hertz, who published the first thorough investigation in 1887. Another particularly thorough investigation was published by Philipp Lenard in 1902. Einstein's 1905 paper discussing the effect in terms of light quanta would earn him the Nobel Prize in 1921, when his predictions had been confirmed by the experimental work of Robert Andrews Millikan. The Nobel committee awarded the prize for his work on the photo-electric effect, rather than relativity, both because of a bias against purely theoretical physics not grounded in discovery or experiment, and dissent amongst its members as to the actual proof that relativity was real.
Who published the first thorough investigation of the photoelectric effect?
Answer: Heinrich Hertz
Context and question: The actual resistance of the filament is temperature dependent. The cold resistance of tungsten-filament lamps is about 1/15 the hot-filament resistance when the lamp is operating. For example, a 100-watt, 120-volt lamp has a resistance of 144 ohms when lit, but the cold resistance is much lower (about 9.5 ohms). Since incandescent lamps are resistive loads, simple phase-control TRIAC dimmers can be used to control brightness. Electrical contacts may carry a "T" rating symbol indicating that they are designed to control circuits with the high inrush current characteristic of tungsten lamps. For a 100-watt, 120-volt general-service lamp, the current stabilizes in about 0.10 seconds, and the lamp reaches 90% of its full brightness after about 0.13 seconds.
What does not determine the actual resistance of a filament?
Answer: unanswerable
Context and question: Instead of being defined by "non" words, some organizations are suggesting new, positive-sounding terminology to describe the sector. The term "civil society organization" (CSO) has been used by a growing number of organizations, such as the Center for the Study of Global Governance. The term "citizen sector organization" (CSO) has also been advocated to describe the sector – as one of citizens, for citizens – by organizations such as Ashoka: Innovators for the Public. A more broadly applicable term, "Social Benefit Organization" (SBO) has been advocated for by organizations such as MiniDonations. Advocates argue that these terms describe the sector in its own terms, without relying on terminology used for the government or business sectors. However, use of terminology by a nonprofit of self-descriptive language that is not legally compliant risks confusing the public about nonprofit abilities, capabilities and limitations.
What term does Ashoka: Innovators for the Public support as more broadly used?
Answer:
unanswerable