72 résultats pour "carry"
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Rocket.
the vacuum of space, however, demonstrated that this belief was not true. In fact, rockets produce more thrust in the vacuum of space than on Earth. Air pressure andfriction with the air reduce a rocket’s thrust by about 10 percent on Earth as compared to the rocket’s performance in space. B Thrust and Efficiency Thrust is a measurement of the force of a rocket, or the amount of “push” exerted backward to move a rocket forward. Thrusts vary greatly from rocket to rocket.Engineers measure thrust...
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Rocket - astronomy.
the vacuum of space, however, demonstrated that this belief was not true. In fact, rockets produce more thrust in the vacuum of space than on Earth. Air pressure andfriction with the air reduce a rocket’s thrust by about 10 percent on Earth as compared to the rocket’s performance in space. B Thrust and Efficiency Thrust is a measurement of the force of a rocket, or the amount of “push” exerted backward to move a rocket forward. Thrusts vary greatly from rocket to rocket.Engineers measure thrust...
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Quark
I
INTRODUCTION
Quark, smallest known building block of matter.
Constituents of MatterMatter is composed of tiny particles called quarks. Quarks come in six varieties: up (u), down (d), charm (c), strange (s),top (t), and bottom (b). Quarks also have antimatter counterparts called antiquarks (designated by a line over the lettersymbol). Quarks combine to form larger particles called baryons, and quarks and antiquarks combine to form mesons.Protons and neutrons, particles that form the nuclei of atoms, are examples of baryons. Positive and negative kaons aree...
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Great Lakes - Geography.
of 1972 and 1978, have focused on water-quality problems in the Great Lakes. The International Joint Commission on the Great Lakes, established under the BoundaryWaters Treaty, implements and oversees these agreements and has limited authority to regulate obstructions or diversions of boundary waters that would affect thenatural level or flow of lake waters. B Exotic Species The fish populations of the lakes have changed dramatically in the 20th century; changes were wrought at first by overfis...
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Dogsledding.
Mushers are caretakers, but also coaches. Top mushers have large kennels, and their preparation for competition begins by buying and breeding race-specific dogs.They train their dogs, decide which to run on certain days, and make adjustments during races by switching and dropping dogs. Serious competitors run their dogsyear-round, using carts and all-terrain vehicles when there is not enough snow on the ground. During races they decide their strategy, choosing when to rest and whento push ahead....
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From Bulfinch's Mythology: Bacchus (Dionysus) - anthology.
me their fishing rods and nets and their fisherman's trade. This I followed for some time, till growing weary of remaining in one place, I learned the pilot's art and howto guide my course by the stars. It happened as I was sailing for Delos we touched at the island of Dia and went ashore. Next morning I sent the men for fresh water,and myself mounted the hill to observe the wind; when my men returned bringing with them a prize, as they thought, a boy of delicate appearance, whom they hadfound a...
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Comedy
Socrates suffered in the comedy of Aristophanes. Throughout history, opposition to comedy and laughter has been strongest in societies which emphasize physical restraint, decorum and conformity. Many medieval monastic orders had statutes forbidding laughter. The Puritan and Victorian eras saw many condemnations of comedy and laughter. The more authoritarian the regime, the greater its suppression of comedy. Hitler even set up ‘joke courts' to punish those who made fun of his regime - one Berl...
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Black Death.
disappeared in the West. V DISAPPEARANCE OF PLAGUE Plague became less common in Europe after the 1530s. The last plague in England was in 1665, the last in Western Europe in 1722. Numerous theories have beenoffered to explain the disappearance of plague. It has been argued that black rats, the primary carriers of plague, may have been replaced by larger brown rats that donot carry the infection. A second theory suggests that increased immunity among the rodents that carried the disease or chang...
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Black Death .
disappeared in the West. V DISAPPEARANCE OF PLAGUE Plague became less common in Europe after the 1530s. The last plague in England was in 1665, the last in Western Europe in 1722. Numerous theories have beenoffered to explain the disappearance of plague. It has been argued that black rats, the primary carriers of plague, may have been replaced by larger brown rats that donot carry the infection. A second theory suggests that increased immunity among the rodents that carried the disease or chang...
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Excerpt from Twelfth Night - anthology.
OLIVIA. What mean'st thou by that, Malvolio? MALVOLIO. “Some are born great—” OLIVIA. Ha? MALVOLIO. “Some achieve greatness—” OLIVIA. What sayst thou? MALVOLIO. “And some have greatness thrust upon them.” OLIVIA. Heaven restore thee! MALVOLIO. “Remember who commended thy yellow stockings—” OLIVIA. Thy yellow stockings? MALVOLIO. “—and wished to see thee cross-gartered.” OLIVIA. Cross-gartered? MALVOLIO. “Go to, thou art made if thou desir'st to be so.” OLIVIA. Am I maid! MALVOLIO. “If not, let m...
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Excerpt from Martin Chuzzlewit - anthology.
But there is one other piece of evidence, bearing immediate reference to their close connextion with this memorable event in English History, which must carryconviction, even to a mind (if such a mind there be) remaining unconvinced by these presumptive proofs. There was, within a few years, in the possession of a highly respectable and in every way credible and unimpeachable member of the Chuzzlewit Family (for hisbitterest enemy never dared to hint at his being otherwise than a wealthy man...
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Surgery.
III SURGICAL PROCEDURES Surgical procedures are classified as optional, required, elective, urgent, and emergent based on the patient’s medical condition. Optional surgery consists of operationsthat are not required but which the patient chooses to undergo as with some types of cosmetic surgery. Required surgery is performed when only surgery will correct aproblem—such as cataracts—but the surgery can be delayed for a period of weeks or months. Elective surgical procedures usually involve cond...
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Mountain Climbing.
teeth on one side, and a straight, flat, metal blade called an adze on the other. Ice axes have many uses. One of the most common is to help the climber stay balanced on steep slopes. The climber swings the axe with a short, quick movement to lodge the pick in snow or ice, creating a secure anchor. If a climber should slip and beginsliding down a snowfield, a self-arrest can be performed by turning face down on the snow and burying the pick in the snow surface. The climber’s weight over the...
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Electoral College.
III HISTORY OF THE ELECTORAL COLLEGE A Origins One thing is clear about the political theory underpinning the electoral college: The framers of the Constitution could not agree on one. From the outset, the framerswere uncertain about how the president should be chosen. Meeting in the Constitutional Convention in Philadelphia, Pennsylvania, in 1787, the framers originally decidedto have Congress choose the president, and that there should be no popular vote to elect the president. Then the Con...
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Moon - astronomy.
B Volcanic Features Maria, domes, rilles, and a few craters display indisputable characteristics of volcanic origin. Maria are plains of dark-colored rock that cover approximately 40 percent ofthe Moon's visible hemisphere. The maria formed when molten rock erupted onto the surface and solidified between 3.16 billion and 3.96 billion years ago. This rockresembles terrestrial basalt, a volcanic rock type widely distributed on Earth, but the rock that formed the maria has a higher iron content an...
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Canadian Parliament.
government’s legislative program. Members of Commons can also present a motion in response to the Budget Speech, which reviews the government’s economicrecord, taxation, and expenditure plans, and to Supply Motions, which concern budgets for individual departments. If a majority of MPs support a no-confidence motion,the government must resign. Also, if Parliament rejects a significant government proposal, the government is expected to resign and request the governor-general to call an election....
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Lebanon (country) - country.
during the civil war. Within the country, thousands of Shia Muslim refugees fled fighting in southern Lebanon in the 1990s and moved into shantytowns in Beirut’ssouthern suburbs. Lebanon’s major cities were greatly affected by the civil war. Beirut has gradually regained most of its prewar population and remains the country’s largest city. Tripoli,the northern port, is the second largest city. Jūniyah, north of Beirut, was developed as a wartime port and subsequently had a population boom. Za ḩl...
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Bird.
I
INTRODUCTION
Bird, animal with feathers and wings. Birds are the only
B Physical Adaptations for Flight The internal body parts of all birds, including flightless ones, reflect the evolution of birds as flying creatures. Birds have lightweight skeletons in which many of themajor bones are hollow. A unique feature of birds is the furculum, or wishbone, which is comparable to the collarbones of humans, although in birds the left and rightportions are fused together. The furculum absorbs the shock of wing motion and acts as a spring to help birds breathe while they...
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Bird - biology.
B Physical Adaptations for Flight The internal body parts of all birds, including flightless ones, reflect the evolution of birds as flying creatures. Birds have lightweight skeletons in which many of themajor bones are hollow. A unique feature of birds is the furculum, or wishbone, which is comparable to the collarbones of humans, although in birds the left and rightportions are fused together. The furculum absorbs the shock of wing motion and acts as a spring to help birds breathe while they...
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Football.
C Special Teams Each team has players who enter the game during special plays such as kickoffs, field goals, punts, and returns. The kicker kicks off at the beginning of a game or half,and after his team has scored. The kicker also scores points for the offensive team by kicking the ball through the goalpost’s vertical posts, also known as the uprights;these scores are called field goals. When the offensive team must surrender the ball to the opponents, a punter comes in to kick the ball downfi...
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Woodrow Wilson.
daughters. In 1885 Wilson also accepted a position with the newly opened Bryn Mawr College, a school for women near Philadelphia. Wilson was not particularly patient with womenas intellectual associates and did not enjoy his teaching duties. He was, however, able to pursue his writing. A University Professor In 1888 Wilson left Bryn Mawr for a professorship in history and political economy at Wesleyan University in Connecticut. There, in 1889, he published The State, a lengthy textbook analyz...
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Woodrow Wilson
daughters. In 1885 Wilson also accepted a position with the newly opened Bryn Mawr College, a school for women near Philadelphia. Wilson was not particularly patient with womenas intellectual associates and did not enjoy his teaching duties. He was, however, able to pursue his writing. A University Professor In 1888 Wilson left Bryn Mawr for a professorship in history and political economy at Wesleyan University in Connecticut. There, in 1889, he published The State, a lengthy textbook analyz...