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Sine wave

A sine wave is a curve with this shape: This is a picture of a sine wave. All waves can be made by adding up sine waves. The sine wave has a pattern that repeats. The length of this repeating piece of the sine wave is called the wavelength. The w ...

                                               

Spacetime metric

In special relativity, the spacetime metric, also called the Minkowski metric, is the metric tensor that describes the line element in Minkowski spacetime.

                                               

Spallation

Spallation is a process whereby material is released from a body because of impact or stress. In impact mechanics, it is the release of material from a target during impact by a projectile. In planetary physics, it is the impact of a meteoroid on ...

                                               

Standing wave

In physics, a standing wave – also called a stationary wave – is a wave that oscillates in one constant position. The word oscillate simply describes the vibrating movement of particles in a medium when acted upon by a wave, or the regular up and ...

                                               

Stefan–Boltzmann law

In quantum physics, the Stefan-Boltzmann law states that the black-body radiation energy emitted by a given object is directly proportional to the temperature of the object raised to the fourth power. The equation for this law is: R=σ T 4 where σ ...

                                               

Sterile neutrino

Sterile neutrinos, also known as neutral heavy leptons, heavy neutrinos, or right-handed neutrinos, are theoretical particles that are extremely difficult to find. This is because they are not affected by all of fundamental forces that rule norma ...

                                               

Surface gravity

The surface gravity, g, of an astronomical or other object is the gravitational acceleration experienced at its surface. The surface gravity may be thought of as the acceleration caused by the gravity experienced by a hypothetical test particle w ...

                                               

Terminal velocity

Terminal velocity is the speed when an object falling through a fluid is no longer getting faster. Terminal velocity happens at the moment in time that the force of gravity, called weight, is the same as the opposite force of air resistance or fr ...

                                               

Tevatron

The Tevatron was a giant Particle accelerator in Illinois that was used by scientists to make protons go very fast, almost the speed of light in some cases. Scientists looked at what happens when the protons hit antiprotons to see if they are rig ...

                                               

Theory of everything

We do not have a theory of everything. It is a hope for the future. The basic concept of the theory of everything is that one theory could explain every aspect of physics. The four basic forces of nature are gravity, the strong force, the weak fo ...

                                               

Transit of Venus

A transit of Venus across the Sun happens when the planet Venus goes between the Sun and Earth. It is a syzygy and a partial occultation of the Sun. When a transit happens, Venus can be seen as a small black dot going across the Sun. Transits of ...

                                               

Twin paradox

The twin paradox in physics is a thought experiment in special relativity. It involves identical twins, one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on Earth has aged more. The ...

                                               

Tyndall effect

The Tyndall effect is when light is scattered by particles of matter in its path. It makes a beam of light visible by lighting the particles. Under the Tyndall effect, the longer-wavelength light is more transmitted while the shorter-wavelength l ...

                                               

Ultraviolet catastrophe

The ultraviolet catastrophe is the name given to a conflict between theory and the observation in classical physics. An ideal black body at thermal equilibrium emits radiation in all frequency ranges. It emits more energy as the frequency increas ...

                                               

Vaporization

Vaporization is a phase change from liquid to vapor. There are two types of vaporization: evaporation and boiling. Evaporation is a phase change from liquid to vapour. Evaporation happens below the boiling point of a substance at a given pressure ...

                                               

Virtual image

In optics, a virtual image is an image formed when the outgoing rays from an object always diverge. A plane mirror forms a virtual image positioned behind the mirror. Light from the source only exists in front of the mirror. The image in a plane ...

                                               

WOH G64

WOH G64 is a red supergiant star. It is the largest star in the Large Magellanic Cloud. It has a radius of 1.800 to over 2.400 times that of the Sun. It is one of the largest known stars. It is also one of the coolest stars in the LMC, with an ef ...

                                               

1910 Atlantic hurricane season

The 1910 Atlantic hurricane season was the period of 1910 when tropical storms formed. It happened during the summer and the first half of fall in 1910. The season was quiet, with only five known storms.

                                               

1914 Atlantic hurricane season

The 1914 Atlantic hurricane season was the shortest and least active hurricane season on record. This season had only one storm with two other possible storms. This season was also one of two to not have a hurricane with the other being 1907.

                                               

1928 Okeechobee hurricane

The 1928 Okeechobee hurricane, also called the San Felipe hurricane, was a very bad tropical cyclone. Almost 4.100 people died in the northeast Caribbean, Puerto Rico and southeast Florida to North Carolina. This hurricane had wind close to Categ ...

                                               

1935 Labor Day Hurricane

The Labor Day Hurricane of 1935 was the strongest tropical cyclone during the 1935 Atlantic hurricane season. The second tropical cyclone, second hurricane, and second intense hurricane of the season was the most intense Atlantic hurricane that a ...

                                               

1936 North American heat wave

The 1936 North American heat wave was the most severe heat wave in United States history. It happened in the middle of the Great Depression and the Dust Bowl of the 1930s. The heat wave began in late June. It created great human suffering. It als ...

                                               

1938 New England hurricane

The 1938 New England Hurricane was an extremely damaging and highly deadly Atlantic tropical cyclone which struck Long Island, Connecticut, Rhode Island, Massachusetts, Maine, New Hampshire and Vermont with strong winds of Category 4 hurricane le ...

                                               

1947 Fort Lauderdale hurricane

The Fort Lauderdale Hurricane of 1947 was a very intense Atlantic hurricane. It affected the Bahamas, southern Florida and the Gulf Coast of the United States. The hurricane struck the Bahamas September 16, 1947, and Florida on September 18. In F ...

                                               

1967 Atlantic hurricane season

The 1967 Atlantic hurricane season officially began on June 1, 1967, and lasted until November 30, 1967. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The season was fairly aver ...

                                               

1970 Atlantic hurricane season

The 1970 Atlantic hurricane season was the period of time in 1970 that tropical cyclones formed in Atlantic Ocean. It officially began on June 1, 1970, and it ended on November 30, 1970. Strong storms of 1970 include Hurricane Celia, which killed ...

                                               

1970 Pacific hurricane season

The 1970 Pacific hurricane season began on May 15, 1970 in the east Pacific, and on June 1, 1970 in the central Pacific. It ended on November 30, 1970. These dates conventionally delimit the period of time when tropical cyclones form in the easte ...

                                               

1972 Pacific hurricane season

The 1972 Pacific hurricane season began on May 15, 1972 in the east Pacific, and on June 1, 1972 in the central Pacific. It ended on November 30, 1972. These dates conventionally delimit the period of time when tropical cyclones form in the east ...

                                               

1977 Pacific hurricane season

The 1977 Pacific hurricane season officially started May 15, 1977 in the eastern Pacific, and June 1, 1977 in the central Pacific, and lasted until November 30, 1977. These dates start and end the period of each year when most tropical cyclones f ...

                                               

1983 Pacific hurricane season

The 1983 Pacific hurricane season officially started May 15, 1983 in the eastern Pacific, and June 1, 1983 in the central Pacific, and lasted until November 30, 1983. These dates conventionally delimit the period of each year when most tropical c ...

                                               

1984 Atlantic hurricane season

The 1984 Atlantic hurricane season officially began on June 1, 1984 and ended on November 30, 1984. Sometimes storms form outside these dates for example. An example of this is Hurricane Lili, which formed on December 12. Lili lasted until Decemb ...

                                               

1985 Atlantic hurricane season

The 1985 Atlantic hurricane season officially began on June 1, 1985 and ended on November 30, 1985. However storms can form outside these dates for example, Tropical Depression Thirteen formed on December 7. As far as activity goes this was avera ...

                                               

1987 Atlantic hurricane season

The 1987 Atlantic hurricane season officially began on June 1 1987 and ended November 30 1987. However, storm can form outside these dates for example, Tropical Depression One form on May 25. This season was average in activity. However it featur ...

                                               

1987 Pacific hurricane season

The 1987 Pacific hurricane season officially started May 15, 1987 in the eastern Pacific, and June 1, 1987 in the central Pacific, and lasted until November 30, 1987. These dates conventionally delimit the period of each year when most tropical c ...

                                               

1988 Atlantic hurricane season

The 1988 Atlantic hurricane season officially began on June 1, 1988 and ended on November 30, 1988. However tropical cyclone can form outside these dates for example, Tropical Depression One formed on May 30. This season was active with 19 depres ...

                                               

1988 Pacific hurricane season

The 1988 Pacific hurricane season officially started May 15, 1988 in the eastern Pacific, and June 1, 1988 in the central Pacific, and lasted until November 30, 1988. These dates conventionally delimit the period of each year when most tropical c ...

                                               

1989 Atlantic hurricane season

The 1989 Atlantic hurricane season officially began on June 1, 1989, and lasted until November 30, 1989. However storms can form outside these dates. For example, Tropical Storm Karen lasted until December 4. This season had average activity with ...

                                               

1989 Pacific hurricane season

The 1989 Pacific hurricane season officially started May 15, 1989 in the Eastern Pacific, and June 1, 1989 in the Central Pacific, and lasted until November 30, 1989. These dates conventionally delimit the period of each year when most tropical c ...

                                               

1990 Atlantic hurricane season

The 1990 Atlantic hurricane season officially began on June 1, 1990, and lasted until November 30, 1990. However, storms can form outside these dates. For example, Tropical Depression One formed on May 25. This season was very active with two dep ...

                                               

1991 Atlantic hurricane season

The 1991 Atlantic hurricane season officially began on June 1, 1991, and lasted until November 30, 1991. However storms can form outside these dates. This season experinced low activity with only 4 depressions, 4 tropical storms, 2 hurricanes, an ...

                                               

1991 Bangladesh cyclone

The Bangladesh Cyclone of 1991 was an extremely devastating super cyclonic storm. On the evening of Monday, April 29, 1991 a strong super cyclonic storm struck the Chittagong area of southeastern Bangladesh with winds around 155 mph. The storm ki ...

                                               

1991 Halloween Noreaster

The 1991 Halloween Nor’easter, also known as the Perfect Storm, was an atypical nor’easter which was extratropical, absorbed one hurricane, and ultimately evolved into a small hurricane late in its life cycle. The unnamed hurricane of 1991 was th ...

                                               

1992 Atlantic hurricane season

The 1992 Atlantic hurricane season started on June 1, 1992, and lasted until November 30, 1992. However, storms can form outside these dates. For example, Subtropical Storm One formed on April 21. This season did not have very many storms, with o ...

                                               

1992 Pacific hurricane season

The 1992 Pacific hurricane season was the most active Pacific season on record. The most notable storm was Hurricane Iniki, which caused billions of dollars of damage to the Hawaiian Islands. Hurricanes Lester, Virgil, Winifred, and Orlene also m ...

                                               

1993 Atlantic hurricane season

The 1993 Atlantic hurricane season officially began on June 1, 1993, and lasted until November 30, 1993. Storms can form outside these dates. Tropical Depression One, for example, formed on May 31. This season had low activity with only 8 storms. ...

                                               

1995 Chicago heat wave

The 1995 Chicago heat wave was a major heat wave. It led to over 600 heat-related deaths in Chicago. Most of the heat wave victims were old or poor people. They did not have enough money for air conditioning and would not open their windows. The ...

                                               

1995 Pacific hurricane season

The 1995 Pacific hurricane season was the least active Pacific hurricane season since 1979. Of the eleven tropical cyclones that formed during the season, four affected land, with the most notable storm of the season being Hurricane Ismael, which ...

                                               

1997 Atlantic hurricane season

The 1997 Atlantic hurricane season was an Atlantic hurricane season. It began on June 1, 1997 and ended on November 30, 1997. However, Subtropical Storm One formed on May 31, a day before June 1. The 1997 Atlantic hurricane season had only seven ...

                                               

1998 Atlantic hurricane season

The 1998 Atlantic hurricane season was the second deadliest Atlantic hurricane season. It began on June 1, 1998, and it ended on November 30, 1998. However, one storm lasted until after the end of the season. This season had 14 named storms, 10 h ...

                                               

1999 Bridge Creek-Moore tornado

The 1999 Bridge Creek-Moore tornado was a very violent F5 tornado that hit the Bridge Creek and Moore areas of Oklahoma on the evening of May 3, 1999. It had the highest wind speed ever recorded at 301 miles per hour. It killed at least 36 people ...