Research Results For 'Kelvin'

JAMES RUSSELL

James Burn Russell was a Scottish doctor. He was born in 1837 at Glasgow and died in 1904. He assisted Lord Kelvin in his preparations for the Atlantic Cable expedition. He was next medical officer of health in Glasgow for twenty-six years, and brought prominently forward the question of the housing of the poor. among his works are 'Lectures on the Theory and Prevention of Infectious Diseases', published in 1879, and 'On the Prevention of Tuberculosis' published in 1896.
Research James Russell

WILLIAM KELVIN

William Thomson Kelvin (Baron Kelvin) was a professor of Natural Philosophy at Glasgow. He was born in 1824 at Belfast and died in 1907. He determined the absolute zero of temperature.
Research William Kelvin

ABSOLUTE TEMPERATURE

Absolute Temperature is temperature based on the absolute zero of temperature (-273 degrees Celsius or 0 degrees Kelvin) at which a body possesses no thermal energy.
Research Absolute Temperature

COMPASS

A compass is an instrument used to indicate the magnetic meridian or the position of objects with respect to that meridian, and employed especially on ships, and by surveyors and travellers.

The origin of the compass is unknown, but it is supposed to have been brought from China to Europe about the middle of the 13th century. As now generally used it consists of three parts: namely, the box, the card or fly, and the needle - the
latter being the really essential part, and consisting of a small magnet so suspended that it may be able to move freely in a horizontal direction. The box, which contains the card and needle, is, in the case of the common mariner's compass, a circular brass receptacle hung within a wooden one by two concentric rings called gimbals,, so fixed by the cross centres to the box that the inner one, or compass-box, shall retain a horizontal position in all motions of the ship. The circular card is divided into thirty-two equal parts by lines drawn from the centre to the circumference, called points or rhumbs; the intervals between the points are also divided into halves and quarters, and the whole circumference into equal parts or degrees, 360 of which complete the circle; and, consequently, the distance or angle comprehended between any two rhumbs is equal to 11.25 degrees.

The four principal rhumbs are called cardinal points: North, South, East, and West. The names of the rest are compounded of these.

The needle is a small bar of magnetized steel. It is fixed on the under side of the card, and in the centre is placed a conical socket, which is poised on an upright pointed pin fixed in the bottom of the box; so that the card, hanging on the pin, turns freely round its centre, and one of the points, by the property of the needle, will always be directed towards the north pole. The needle, however, is liable to a certain deviation owing to the magnetism of the ship itself, and this is especially strong in iron ships. To obviate this Sir W Thomson (Lord Kelvin) invented a compass, having a number of needles arranged in a particular manner instead of one. In this compass quadrantal errors are corrected by means of two iron globes fixed on opposite sides of the binnacle; while the various components of the ship's magnetic force are neutralized by a series of bar-magnets so arranged as to act as correctors. In the compass used by land-surveyors and others the needle is not fixed to the card, but plays alone, the card being-drawn on the bottom of the box.
Research Compass

CURB-SENDER

The curb-sender was an automatic signalling apparatus invented by Sir W Thomson (Lord Kelvin) and Professor Fleeming Jenkin of Edinburgh, and used in submarine telegraphy. The message was punched on a paper ribbon, which was then passed through the transmitting apparatus by clockwork. The name is due to the fact that when a current of one kind of electricity is sent by the instrument another of the opposite kind is sent immediately after to curb the first, the effect of the second transmission being to make the indication produced by the first sharp and distinct, instead of slow and uncertain.
Research Curb-Sender

JOULE-THOMSON EFFECT

The Joule-Thomson effect (also known as the Joule-Kelvin effect) is the change in temperature that occurs when a gas expands through a porous plug into a region of lower pressure. For most real gases the temperature falls under these circumstances as the gas has to do internal work in overcoming the intermolecular forces to enable the expansion to take place. This is a deviation from Joule's law. There is usually also a deviation from Boyle's law, which can cause either a rise or a fall in temperature since any increase in the product of pressure and volume is a measure of external work done. At a given pressure, there is a particular temperature, called the inversion temperature of the gas, at which the rise in temperature from the Boyle's law deviation is balanced by the fall from the Joule's law deviation. There is then no temperature change. Above the inversion temperature the gas is heated by expansion, below it, it is cooled. The effect was discovered by James Joule working in collaboration with William Thomson (who
later became Lord Kelvin).
Research Joule-Thomson Effect

KELVIN

Kelvin is a temperature scale in which the absolute zero of temperature (-273 degrees Celsius) is represented by zero degrees Kelvin.
Research Kelvin

K

K is an abbreviation for Kilo
K is an abbreviation for K-Band
K is an abbreviation for Kalium (Potassium)
K is an abbreviation for Kelvin
K is an abbreviation for Strikeout

KELVIN

HMS Kelvin was a British Javelin Class destroyer of 1690 tons displacement launched in 1939. She was armed with six 4.7-inch guns; six smaller guns and ten 21-inch torpedo tubes. She was powered by two Admiralty 3-drum type boilers providing a top speed of 36 knots and carried a complement of 183.
Research Kelvin

VANGUARD 2

HMS Vanguard was a British battleship designed during the Second World War but not completed until 1946, and was the eighth British ship to bear the name
Vanguard. She had a displacement of 42500 tons and carried a crew of 2000. She was powered by eight Admiralty 3-drum type boilers and Parsons single reduction geared turbines rated at 130000 SHP which provided a top speed of 29 knots. Armaments consisted of eight 15 inch 42 calibre main guns, sixteen 5.25 inch dual-purpose guns, four 3 pounder guns and 71 40 mm Bofors anti-aircraft guns. *Vanguard 3
HMS Vanguard is a British Vanguard Class ballistic missile nuclear powered submarine of 15900 tons displacement submerged. HMS Vanguard has the capacity to carry 16 Trident missiles and is fitted with four 21 inch torpedo tubes and carries the Tigerfish and Spearfish torpedoes. HMS Vanguard is equipped with the BAE Systems Type 2054 composite sonar system. The Vanguard's towed sonar array is the Type 2046 which provides passive search capability and operates at very low frequency. The Type 2043 is the hull mounted active and passive mode search sonar and the Type 2082 sonar provides passive intercept and ranging capability.
The submarine is fitted with the CK51 search periscope and the CH91 attack periscope developed by Pilkington Optronics. These periscopes include TV camera and thermal imager as well as optical channel.

All HMS Vnguard's above water sensors are combined into self-protection masts in the submarine's fin. The submarine's navigation radar is the Type 1007 I-band radar supplied by Kelvin Hughes. The Vanguard submarine's main nuclear powered propulsion system is based on the Rolls-Royce PWR 2. The other main items of machinery are two GEC turbines, and a single shaft with a pump jet propulsor. There are two Paxman diesel alternators, and two turbo generators from WH Allen. The propulsion system provides a maximum submerged speed of 25 knots. The second generation reactor, PWR 2, was developed specifically for the Vanguard Class Trident submarines.
Research Vanguard 2

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