Equatorial waves are oceanic or atmospheric waves that occur in the equatorial regions of the Earth. These waves are characterized by their unique dynamics and properties influenced by the Earth's rotation, the Coriolis force, and the stratification of the atmosphere or ocean. The most notable types of equatorial waves include: 1. **Equatorial Kelvin Waves**: These are eastward-propagating waves influenced by the Coriolis effect and are characterized by their dispersion relation.

The Kelvin wake pattern, also known as the Kelvin wake or Kelvin wave pattern, refers to the specific formation of waves that occurs behind an object moving through a fluid, such as air or water. This phenomenon is named after the British physicist Lord Kelvin, who conducted extensive studies on fluid dynamics. When a body moves at a certain speed through a fluid, it generates a series of wave patterns that extend outward from the object.

A megatsunami is a large and extremely destructive tidal wave that is generated by a massive displacement of water, often as a result of geological events such as volcanic eruptions, landslides, or underwater earthquakes. Unlike typical tsunamis, which are usually caused by seismic activity and can travel across entire ocean basins, megatsunamis involve much larger volumes of water being displaced in a very short time frame, leading to waves that can reach extraordinary heights—sometimes hundreds of meters.

Ski wax is a specialized substance applied to the base of skis and snowboards to enhance their performance on snow. It reduces friction between the snow and the ski or snowboard, allowing for smoother gliding and improved speed. Ski wax can also provide better control and stability during turns. There are different types of ski wax, categorized primarily into two groups: 1. **Glide Wax**: Used to optimize the glide of skis and snowboards on snow.

Wave-making resistance refers to a type of hydrodynamic resistance that occurs when a vessel moves through water, creating waves as it displaces water. This phenomenon is especially significant for ships and boats, as the energy required to generate these waves contributes to the overall resistance that the vessel experiences as it moves.

Waves and shallow water refer to specific concepts in oceanography and hydrodynamics. ### Waves Waves are disturbances that transfer energy through a medium, usually water in the context of oceans and seas. They can be classified based on various factors, including their generation, characteristics, and the medium in which they travel. Key points about waves include: - **Types of Waves**: There are several types of waves, including wind-generated waves, seismic waves, and tidal waves.

Microcrystalline wax is a type of synthetic wax produced from the refining of crude oil. It is different from other forms of wax, such as paraffin wax, due to its finer crystalline structure and its characteristics of being more flexible, adhesive, and moisture-resistant. **Key properties of microcrystalline wax include:** 1. **Composition**: It consists of a complex mixture of hydrocarbons and is typically more refined than paraffin wax.

Bayberry wax is a natural wax derived from the berries of the bayberry shrub (Myrica pensylvanica and Myrica cerifera), which are native to North America. The wax is extracted from the fruit through a process of boiling and then filtering. Bayberry wax has a distinctive greenish hue and is known for its pleasant, earthy scent.

Cetyl palmitate is a waxy substance derived from the esterification of cetyl alcohol and palmitic acid. It is commonly used in cosmetics and personal care products as an emollient, thickening agent, and skin-conditioning agent. Its properties help to create a smooth texture in formulations, improve the spreadability of products, and enhance the moisturizing effects on the skin.

Jojoba is a plant native to the southwestern United States and northern Mexico, scientifically known as **Simmondsia chinensis**. It is best known for its seeds, which produce a liquid wax that is commonly referred to as jojoba oil. This oil is highly valued in cosmetics and personal care products due to its moisturizing properties, stability, and similarity to human sebum, making it effective for skin and hair care.

Montan wax is a natural wax that is derived from lignite, a precursor to coal. It is primarily composed of long-chain fatty acids and alcohols. Montan wax is obtained by extracting and refining the lignite through processes such as solvent extraction and hydrolysis. This wax is known for its unique properties, including high melting points, resistance to heat and chemicals, and excellent gloss and hardness.

Fermi's interaction refers to the fundamental weak nuclear force that governs the interactions of elementary particles, particularly those involving leptons (like electrons and neutrinos) and quarks. This interaction is largely described within the framework of the electroweak theory, which unifies the electromagnetic force and the weak nuclear force. The term "Fermi interaction" is often associated with Enrico Fermi, who made significant contributions to the understanding of weak interactions in the early 20th century.

Lightning injury refers to damage caused by lightning strikes, which can result in a range of injuries, both physical and psychological. These injuries can vary in severity and can affect individuals who are struck directly by lightning, as well as those who are nearby when a strike occurs. ### Types of Lightning Injuries: 1. **Direct Strike**: A person struck directly by lightning can experience severe injuries, including burns, cardiac arrest, and neurological damage. The high voltage can cause immediate physiological disruptions.

Thunderstorm asthma is a phenomenon where a sudden increase in asthma attacks occurs during or after a thunderstorm. This happens when specific weather conditions lead to the release of pollen grains or mold spores into the air, which can then be inhaled. The combination of humidity, wind, and changes in atmospheric pressure can cause the pollen grains to rupture, releasing smaller particles that can penetrate deep into the lungs, triggering asthma symptoms in susceptible individuals.

The weather events of 2017 were marked by a number of significant phenomena globally. Here are some key highlights: 1. **Hurricanes in the Atlantic**: 2017 was an exceptionally active hurricane season. Notable hurricanes included Hurricane Harvey, which caused devastating flooding in Texas, particularly in Houston; Hurricane Irma, which impacted parts of the Caribbean and Florida; and Hurricane Maria, which severely affected Puerto Rico and other Caribbean islands.

The Valid Time Event Code (VTEC) is a code used primarily by the National Weather Service (NWS) in the United States to indicate the validity period of specific weather warnings, watches, or advisories. It is part of a system to communicate critical weather information effectively, especially during severe weather events. The VTEC consists of a specific format that includes the phenomenon type (e.g., tornado, flood), the area affected, and the start and end times of the event.

Spring weather events refer to various meteorological phenomena that occur during the spring season, typically characterized by changes in temperature, precipitation, and atmospheric conditions. These events can vary significantly depending on the geographical location and climate. Some common spring weather events include: 1. **Rain Showers and Thunderstorms**: Spring is often marked by increased rainfall, which can lead to frequent rain showers and thunderstorms. These can be severe in some areas, producing heavy rain, strong winds, and even hail.

Summer weather events refer to various atmospheric phenomena that occur during the summer months, typically characterized by warm temperatures and specific weather patterns. These events can vary widely depending on the geographic location. Common summer weather events include: 1. **Heat Waves**: Prolonged periods of excessively hot weather, often accompanied by high humidity. Heat waves can pose health risks and lead to increased energy demand.

The Farmers' Almanac is a publication that has been in circulation since 1818, known for providing long-range weather forecasts, gardening and planting advice, recipes, and various articles related to rural living and home remedies. It is published annually and is particularly famous for its weather predictions, which are made using a secret formula that takes into account factors such as solar cycles, climatology, and historical weather patterns.

The Ice Saints, also known as the "Ice Saints' Days," refer to a selection of days in mid-May (specifically May 11-13) in some European cultures, particularly in Germany and parts of Central and Eastern Europe. These dates are traditionally associated with the last frost of spring, marking a time when it is believed that cold weather can still occur.