Question: The 1960s was a significant decade for Iranian cinema, with 25 commercial films produced annually on average throughout the early 60s, increasing to 65 by the end of the decade. The majority of production focused on melodrama and thrillers. With the screening of the films Kaiser and The Cow, directed by Masoud Kimiai and Dariush Mehrjui respectively in 1969, alternative films established their status in the film industry. Attempts to organize a film festival that had begun in 1954 within the framework of the Golrizan Festival, bore fruits in the form of the Sepas Festival in 1969. The endeavors also resulted in the formation of the Tehran World Festival in 1973.
Is there an answer to this question: How many commercial films were produced yearly on average in the early 1960s in Iran?

Answer: 25 commercial films


Question: Development of the methods used in modern printed circuit boards started early in the 20th century. In 1903, a German inventor, Albert Hanson, described flat foil conductors laminated to an insulating board, in multiple layers. Thomas Edison experimented with chemical methods of plating conductors onto linen paper in 1904. Arthur Berry in 1913 patented a print-and-etch method in Britain, and in the United States Max Schoop obtained a patent to flame-spray metal onto a board through a patterned mask. Charles Ducas in 1927 patented a method of electroplating circuit patterns.
Is there an answer to this question: Who obtained a patent in 1927 for his method of electroplating circuit patterns?

Answer: Charles Ducas


Question: The assumption that black-body radiation is thermal leads to an accurate prediction: the total amount of emitted energy goes up with the temperature according to a definite rule, the Stefan–Boltzmann law (1879–84). But it was also known that the colour of the light given off by a hot object changes with the temperature, so that "white hot" is hotter than "red hot". Nevertheless, Wilhelm Wien discovered the mathematical relationship between the peaks of the curves at different temperatures, by using the principle of adiabatic invariance. At each different temperature, the curve is moved over by Wien's displacement law (1893). Wien also proposed an approximation for the spectrum of the object, which was correct at high frequencies (short wavelength) but not at low frequencies (long wavelength). It still was not clear why the spectrum of a hot object had the form that it has (see diagram).
Is there an answer to this question: What rule predicts that emitted energy increases with temperature?

Answer: the Stefan–Boltzmann law


Question: The szlachta's prevalent mentality and ideology were manifested in "Sarmatism", a name derived from a myth of the szlachta's origin in the powerful ancient nation of Sarmatians. This belief system became an important part of szlachta culture and affected all aspects of their lives. It was popularized by poets who exalted traditional village life, peace and pacifism. It was also manifested in oriental-style apparel (the żupan, kontusz, sukmana, pas kontuszowy, delia); and made the scimitar-like szabla, too, a near-obligatory item of everyday szlachta apparel. Sarmatism served to integrate the multi-ethnic nobility as it created an almost nationalistic sense of unity and pride in the szlachta's "Golden Liberty" (złota wolność). Knowledge of Latin was widespread, and most szlachta freely mixed Polish and Latin vocabulary (the latter, "macaronisms"—from "macaroni") in everyday conversation.
Is there an answer to this question: What was the prevalent mentality and ideology called? 

Answer:
Sarmatism