Uzi maalum wa kupeana Likes: Comment chochote upate "Like"
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Shimba ya Buyenze
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- Dec 22, 2014
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79. What is bypass heart surgery ?
Using a blood vessel from elsewhere in the body (for instance, the internal thoracic artery), the surgeon will create an alternate route for blood to travel.
Using a blood vessel from elsewhere in the body (for instance, the internal thoracic artery), the surgeon will create an alternate route for blood to travel.
Shimba ya Buyenze
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- Dec 22, 2014
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80. Who invented traffic lights and where were the first ones situated?
THE FIRST traffic signal was invented by J P Knight, a railway signalling engineer. It was installed outside the Houses of Parliament in 1868 and looked like any railway signal of the time, with waving semaphore arms and red-green lamps, operated by gas, for night use. Unfortunately it exploded, killing a policeman. The accident discouraged further development until the era of the internal combustion engine. Modern traffic lights are an American invention. Red-green systems were installed in Cleveland in 1914. Three-colour signals, operated manually from a tower in the middle of the street, were installed in New York in 1918.
THE FIRST traffic signal was invented by J P Knight, a railway signalling engineer. It was installed outside the Houses of Parliament in 1868 and looked like any railway signal of the time, with waving semaphore arms and red-green lamps, operated by gas, for night use. Unfortunately it exploded, killing a policeman. The accident discouraged further development until the era of the internal combustion engine. Modern traffic lights are an American invention. Red-green systems were installed in Cleveland in 1914. Three-colour signals, operated manually from a tower in the middle of the street, were installed in New York in 1918.
Shimba ya Buyenze
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- Dec 22, 2014
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81. What is BREXIT ?
Brexit is an abbreviation for "British exit" which refers to the June 23, 2016, referendum whereby British citizens voted to exit the European Union. The referendum roiled global markets, including currencies, causing the British pound to fall to its lowest level in decades.
Brexit is an abbreviation for "British exit" which refers to the June 23, 2016, referendum whereby British citizens voted to exit the European Union. The referendum roiled global markets, including currencies, causing the British pound to fall to its lowest level in decades.
Shimba ya Buyenze
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- Dec 22, 2014
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82. Why did Russia offer Alaska to U.S. ?
Russia offered Alaska to the US in 1859, because they wanted the US to "off-set the designs of Russia's greatest rival in the Pacific, Great Britain." The Civil War in the US delayed the sale, but after the war, Secretary of State William Seward accepted Russia's renewed offer. On March 30, 1865, he agreed to a proposal from the Russian minister Eduoard de Stoeckl, and bought Alaska for 7.2 million dollars. The Senate approved the treaty on April 9th, Andrew Johnson signed it on May 28th, and Alaska was officially transferred to the US on October 18th.
Russia offered Alaska to the US in 1859, because they wanted the US to "off-set the designs of Russia's greatest rival in the Pacific, Great Britain." The Civil War in the US delayed the sale, but after the war, Secretary of State William Seward accepted Russia's renewed offer. On March 30, 1865, he agreed to a proposal from the Russian minister Eduoard de Stoeckl, and bought Alaska for 7.2 million dollars. The Senate approved the treaty on April 9th, Andrew Johnson signed it on May 28th, and Alaska was officially transferred to the US on October 18th.
carbamazepine
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Wherever there is a human being, there is an opportunity for a kindness.
Lucius Annaeus Seneca
Lucius Annaeus Seneca
Shimba ya Buyenze
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- Dec 22, 2014
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83. What is Net Zero Energy Building ?
A net-zero energy building (NZEB) also known as zero net energy (ZNE) building, is a building with zero net energy consumption, i.e the total amount of energy used by the building on an annual basis is roughly equal to the amount of renewable energy created on the site or in other definition by renewable energy sources elsewhere.
A net-zero energy building (NZEB) also known as zero net energy (ZNE) building, is a building with zero net energy consumption, i.e the total amount of energy used by the building on an annual basis is roughly equal to the amount of renewable energy created on the site or in other definition by renewable energy sources elsewhere.
Shimba ya Buyenze
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- Dec 22, 2014
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84. How do bees make honey ?
You may have seen honeybees buzzing around flowers. If you watch them without getting too close, you will see them crawl right down into a flower. They are searching for a few drops of the sweet nectar, or sugar water, that the flower makes.
The bee will carry a load of nectar from a lot of flowers back to the hive. Then the bees will use their wings to move a little draft of air to evaporate most of the water. What's left is honey.
You may have seen honeybees buzzing around flowers. If you watch them without getting too close, you will see them crawl right down into a flower. They are searching for a few drops of the sweet nectar, or sugar water, that the flower makes.
The bee will carry a load of nectar from a lot of flowers back to the hive. Then the bees will use their wings to move a little draft of air to evaporate most of the water. What's left is honey.
Shimba ya Buyenze
JF-Expert Member
- Dec 22, 2014
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85. How does Cows produce milk ?
A cow's special four-chambered stomach breaks down grasses she eats into things that nourish her and produce milk. The first chamber softens chewed plant material, which the cow burps up and chews again several times. In the next chamber, microorganisms feed on the plant material, making energy and proteins. As the material moves through the other chambers and into the small intestine, nutrients and excess water are absorbed into the bloodstream and then circulate to the mammary gland in the udder. There, special cells combine the nutrients with sugars from the cow's liver to create milk.
A cow's special four-chambered stomach breaks down grasses she eats into things that nourish her and produce milk. The first chamber softens chewed plant material, which the cow burps up and chews again several times. In the next chamber, microorganisms feed on the plant material, making energy and proteins. As the material moves through the other chambers and into the small intestine, nutrients and excess water are absorbed into the bloodstream and then circulate to the mammary gland in the udder. There, special cells combine the nutrients with sugars from the cow's liver to create milk.
Shimba ya Buyenze
JF-Expert Member
- Dec 22, 2014
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86. How does a star blow up ?
A hot bright star blows up when it runs out of fuel.
Here's why that happens. The force of gravity is always puling the matter in the star toward the center. But in that center, small bits of matter called atoms are always fusing together, making bigger atoms and releasing huge amounts of energy. That energy pushes outward and works against the gravity during the star's life. After many millions of years, the star runs out of small atoms. Then it has no more energy to push outward. The star collapses, and when the matter collides in the center, it explodes.
A hot bright star blows up when it runs out of fuel.
Here's why that happens. The force of gravity is always puling the matter in the star toward the center. But in that center, small bits of matter called atoms are always fusing together, making bigger atoms and releasing huge amounts of energy. That energy pushes outward and works against the gravity during the star's life. After many millions of years, the star runs out of small atoms. Then it has no more energy to push outward. The star collapses, and when the matter collides in the center, it explodes.
Shimba ya Buyenze
JF-Expert Member
- Dec 22, 2014
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87. What is the reason of Tides in Sea ?
The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Ocean levels fluctuate daily as the sun, moon and earth interact.
The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Ocean levels fluctuate daily as the sun, moon and earth interact.
