The 2 Main Forms of Energy

The 2 Main Forms of Energy Although there are several types of energy, scientists can group them into two main categories: kinetic energy and potential energy. Here is a look at the forms of energy, with examples of each type. Kinetic Energy Kinetic energy is energy of motion. Atoms and their components are in motion, so all matter possesses kinetic energy. On a larger scale, any object in motion has kinetic energy. A common formula for kinetic energy is for a moving mass: KE 1/2 mv2 KE is kinetic energy, m is mass, and v is velocity. A typical unit for kinetic energy is the joule. Potential Energy Potential energy is energy that matter gains from its arrangement or position. The object has the potential to do work. Examples of potential energy include a sled at the top of a hill or a pendulum at the top of its swing. One of the most common equations for potential energy can be used to determine the energy of an object with respect to its height above a base: E mgh PE is potential energy, m is mass, g is acceleration due to gravity, and h is height. A common unit of potential energy is the joule (J). Because potential energy reflects the position of an object, it can have a negative sign. Whether it is positive or negative depends on whether work is done by the system or on the system. Other Types of Energy While classical mechanics classifies all energy as either kinetic or potential, there are other forms of energy. Other forms of energy include: gravitational energy - the energy resulting from the attraction of two masses to each other.electric energy - energy from a static or moving electrical charge.magnetic energy - energy from the attraction of opposite magnetic fields, repulsion of like fields, or from an associated electric field.nuclear energy - energy from the strong force that bonds protons and neutrons in an atomic nucleus.thermal energy - also called heat, this is energy that can be measured as temperature. It reflects the kinetic energy of atoms and molecules.chemical energy - energy contained in chemical bonds between atoms and molecule.mechanical energy - the sum of the kinetic and potential energy.radiant energy - energy from electromagnetic radiation, including visible light and x-rays (for example). Â  An object may possess both kinetic and potential energy. For example, a car driving down a mountain has kinetic energy from its movement and potential energy from its position relative to sea level. Energy can change from one form into others. For example, a lightning strike can convert electrical energy into light energy, thermal energy, and sound energy. Conservation of Energy While energy can change forms, it is conserved. In other words, the total energy of a system is a constant value. This is often written in terms of kinetic (KE) and potential energy (PE): KE PE Constant A swinging pendulum is an excellent example. As a pendulum swings, it has maximum potential energy at the top of the arc, yet zero kinetic energy. At the bottom of the arc, it has no potential energy, yet maximum kinetic energy.

Admiral Edward Vernon of the Royal Navy

Admiral Edward Vernon of the Royal Navy A distinguished officer in the Royal Navy, Admiral Edward Vernons career commenced in 1700 and spanned a period of 46 years. This saw him learn his trade under Admiral Cloudesley Shovell before establishing himself as a rising star in the ranks. Vernon saw active service in the War of the Spanish Succession (1701-1714) and later in the War of Jenkins Ear and the War of the Austrian Succession. Though he won a triumph at Porto Bello in 1739, he is best remembered for his invention of grog, a rum and water mixture, that was provided to the sailors in his fleets. Grog would go on to become a staple of Royal Navy life until 1970. Early Life Career Born November 12, 1684 in London, Edward Vernon was the son of James Vernon, secretary of state to King William III. Raised in the city, he received some education at the Westminster School before entering the Royal Navy on May 10, 1700. A popular school for the sons of well-placed Britons, Westminster later produced both Thomas Gage and John Burgoyne who would play key roles in the American Revolution. Assigned to HMS Shrewsbury (80 guns), Vernon possessed more education than most his peers. Remaining aboard for less than a year, he shifted to HMS Ipswich (70) in March 1701 before joining HMS Mary (60) that summer. War of the Spanish Succession With the War of the Spanish Succession raging, Vernon received a promotion to lieutenant on September 16, 1702 and was transferred to HMS Lennox (80). After service with the Channel Squadron, Lennox sailed for the Mediterranean where it remained until 1704. When the ship was paid off, Vernon moved to Admiral Cloudesley Shovells flagship, HMS Barfleur (90). Serving in the Mediterranean, he experienced combat during the capture of Gibraltar and Battle of Malaga. Becoming a favorite of Shovell, Vernon followed the admiral to HMS Britannia (100) in 1705 and aided in the capture of Barcelona. Rapidly rising through the ranks, Vernon was elevated to captain on January 22, 1706 at the age of twenty-one. First assigned to HMS Dolphin (20), he shifted to HMS Rye (32) a few days later. After taking part in the failed 1707 campaign against Toulon, Vernon sailed with Shovells squadron for Britain. Nearing the British Isles, several of Shovells ships were lost in the Scilly Naval Disaster which saw four ships sunk and 1,400-2,000 men killed, including Shovell, due to a navigational error. Saved from the rocks, Vernon arrived home and received command of HMS Jersey (50) with orders to oversee the West Indies station. Member of Parliament Arriving in the Caribbean, Vernon campaigned against the Spanish and broke up an enemy naval force near Cartagena in 1710. He returned home at the wars end in 1712. Between 1715 and 1720, Vernon commanded various vessels in home waters and in the Baltic before serving as commodore at Jamaica for a year. Coming ashore in 1721, Vernon was elected to Parliament from Penryn a year later. A staunch advocate for the navy, he was vocal in debates regarding military matters. As tensions with Spain increased, Vernon returned to the fleet in 1726 and took command of HMS Grafton (70). After cruising to the Baltic, Vernon joined the fleet at Gibraltar in 1727 after Spain declared war. He remained there until fighting ended a year later. Returning to Parliament, Vernon continued to champion maritime matters and argued against continued Spanish interference with British shipping. As relations between the two countries worsened, Vernon advocated for Captain Robert Jenkins who had his ear cut off by the Spanish Coast Guard in 1731. Though wishing to avoid war, First Minister Robert Walpole ordered additional troops to be sent to Gibraltar and ordered a fleet to sail for the Caribbean. War of Jenkins War Promoted to vice admiral on July 9, 1739, Vernon was given six ships of the line and ordered to attack Spanish commerce and settlements in the Caribbean. As his fleet sailed west, Britain and Spain severed relations and the War of Jenkins Ear began. Descending on the poorly defended Spanish town of Porto Bello, Panama, he quickly captured it on November 21 and remained there for three weeks. The victory led to the naming of Portobello Road in London and public debut of the song Rule, Britannia!. For his achievement, Vernon was hailed as a hero and was granted Freedom of the City of London. Old Grog The following year saw Vernon order that the daily rum ration provided to the sailors be watered down to three parts water and one part rum in an effort to reduce drunkenness. As Vernon was known as Old Grog for his habit of wearing grogham coats, the new drink became known as grog. Some have argued that Vernon dictated the addition of citrus juice to the mixture which would led to much-reduced rates of scurvy and other diseases in his fleet as it would have added a daily dose of Vitamin C. This appears to be a misreading of his original orders and was not part of the original recipe. Failure at Cartagena In an effort to follow up Vernons success at Porto Bello, in 1741 he was given a large fleet of 186 ships and 12,000 soldiers led by Major General Thomas Wentworth. Moving against Cartagena, Colombia, British forces were hampered by frequent disagreements between the two commanders and delays ensued. Due to the prevalence of disease in the region, Vernon was skeptical of the operations success. Arriving in early March 1741, British efforts to take the city were plagued by a lack of supplies and rampaging disease. Endeavoring to defeat the Spanish, Vernon was forced to withdraw after sixty-seven days which saw around a third of his force lost to enemy fire and disease. Among those to take part in the campaign was George Washingtons brother, Lawrence, who named his plantation Mount Vernon in the admirals honor. Sailing north, Vernon captured Guantnamo Bay, Cuba and desired to move against Santiago de Cuba. This effort failed due to heavy Spanish resistance and Wentworths incompetence. With the failure of British operations in the region, both Vernon and Wentworth were recalled in 1742. A Return to Parliament Returning to Parliament, now representing Ipswich, Vernon continued to battle on behalf of the Royal Navy. Critical of the Admiralty, he may have authored several anonymous pamphlets which attacked its leadership. Despite his actions, he was promoted to admiral 1745, and took command of the North Sea Fleet in an effort to prevent French aid from reaching Charles Edward Stuart (Bonnie Prince Charlie) and the Jacobite Rebellion in Scotland. Having been refused in his request to be named Commander-in-Chief he elected to step down on December 1. The following year, with the pamphlets circulating, he was removed from the Royal Navys list of flag officers. An avid reformer, Vernon remained in Parliament and worked to improve the Royal Navys operations, protocols, and fighting instructions. Many of the changes he worked for aided in the Royal Navys dominance in the Seven Years War. Vernon continued to serve in Parliament until his death at his estate in Nacton, Suffolk on October 30, 1757. Buried at Nacton, Vernons nephew had a monument erected to his memory at Westminster Abbey.