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A science fair or engineering fair is an event hosted by a school that offers students the opportunity to experience the practices of science and engineering for themselves. In the United States, the Next Generation Science Standards makes experiencing the practices of science and engineering one of the three pillars of science education.
A science project is an educational activity for students involving experiments or construction of models in one of the science disciplines. Students may present their science project at a science fair, so they may also call it a science fair project. Science projects may be classified into four main types.
This caused a wave of concern in the US, whose own Project Vanguard was caught flat-footed and then proved to repeatedly fail in spectacular fashion. This embarrassing turn of events led to a huge investment in US science and technology, including the formation of DARPA , NASA and a variety of intelligence efforts that would attempt to avoid ...
Oct. 30—EPHRATA — Eighteen children showed what they had learned about the world around them Saturday at the Little House Science Fair in Ephrata. "Every year we have a theme, and this year's ...
A standing wave, also known as a stationary wave, is a wave whose envelope remains in a constant position. This phenomenon arises as a result of interference between two waves traveling in opposite directions. The sum of two counter-propagating waves (of equal amplitude and frequency) creates a standing wave. Standing waves commonly arise when ...
In this type the derivative (slope) of the wave's amplitude (in sound waves the pressure, in electromagnetic waves, the current) is forced to zero at the boundary. So there is an amplitude maximum (antinode) at the boundary, the first node occurs a quarter wavelength from the end, and the other nodes are at half wavelength intervals from there:
As with all wave forms, it spreads outward from the source until its energy is overcome or lost, usually by friction or dispersion. The non-dimensional parameter of interest is the Froude number . Wave cloud pattern in the wake of the Île Amsterdam (lower left, at the "tip" of the triangular formation of clouds) in the southern Indian Ocean
Here ψ is the angle between the path of the wave source and the direction of wave propagation (the wave vector k), and the circles represent wavefronts. Consider one of the phase circles of Fig.12.3 for a particular k , corresponding to the time t in the past, Fig.12.2.