IN: The period of daytime from the standpoint of a surface observer is roughly defined as the period between sunrise, when the Earth's rotation towards the east first causes the Sun's disc to appear above the horizon, to sunset, when the continuing rotation of the Earth causes the Sun's disc to disappear below the horizon to the west. Because the Sun is a luminous disc as seen from the Earth, rather than a point source of light, sunrise and sunset are not instantaneous and the exact definition of both can vary with context. Additionally, the Earth's atmosphere further bends and diffuses light from the Sun and lengthens the period of sunrise and sunset. For a certain period after sunset and before sunrise, indirect light from the Sun lightens the sky on Earth; this period is often referred to as twilight. Certain groups, such as Earthly astronomers, do not consider daytime to be truly ended until the Sun's disc is actually well below the Earth's horizon, because of this indirect illumination.
does the sun always set at the same time each day?

OUT: yes

IN: For nearly all models of induction cooktops, a cooking vessel must be made of, or contain, a ferrous metal such as cast iron or some stainless steels. The iron in the pot concentrates the current to produce heat in the metal. If the metal is too thin, or does not provide enough resistance to current flow, heating will not be effective. Most induction tops will not heat copper or aluminum vessels because the magnetic field cannot produce a concentrated current; ''all metal'' induction tops use much higher frequencies to overcome that effect. Any vessel can be used if placed on a suitable metal disk which functions as a conventional hotplate.
can you put cast iron on induction cooktops?

OUT: yes

IN: Legendary for its use of Technicolor, fantasy storytelling, musical score, and memorable characters, it has become an icon of American popular culture. It was nominated for six Academy Awards, including Best Picture, but lost to Gone with the Wind. It did win in two other categories, including Best Original Song for ''Over the Rainbow'' and Best Original Score by Herbert Stothart. While the film was considered a critical success upon release in August 1939, it failed to make a profit for MGM until the 1949 re-release, earning only $3,017,000 on a $2,777,000 budget, not including promotional costs, which made it MGM's most expensive production to that time.
was wizard of oz in color in 1939?

OUT: yes

IN: In the ''law'' of diminishing marginal returns, the marginal product initially increases when more of an input (say labor) is employed, keeping the other input (say capital) constant. Here, labor is the variable input and capital is the fixed input (in a hypothetical two-inputs model). As more and more of variable input (labor) is employed, marginal product starts to fall. Finally, after a certain point, the marginal product becomes negative, implying that the additional unit of labor has decreased the output, rather than increasing it. The reason behind this is the diminishing marginal productivity of labor.
can the marginal product of capital be negative?

OUT:
yes