Answer:
magnets are used in refrigerator to keep the door closed.
it is used in tv and computer screen.
magnets are also used in electrical bell.All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.Magnets are important because of their properties A particle moving in a magnetic field feels a force proportional to his speed, and to the field, so you can use a magnet that produce a field in a certain way and shape, in order to catch a particle in motion.
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To force a bill out of commnittee, a DISCHARGE petition must be signed by a majority of the representatives.
Discharge petitions are often associated with the U.S House of Representatives and used when the committee chair refuses to place a bill or resolution on the Committee's agenda which results to the bill being unreported and not subject to the scrutiny of the House. Discharge petitions requires the signatures of 218 members representing the absolute majority of the House members.
Answer:
The outer planets — Jupiter, Saturn, Uranus, and Neptune are made up of: <em><u> </u></em><em><u>h</u></em><em><u>ydrogen</u></em><em><u> </u></em><em><u>and</u></em><em><u> </u></em><em><u>helium</u></em><em><u> </u></em>
A radioactive element with a half-life of 1,000 years, and starting mass of 20 grams, will need 2,000 years to decrease to 5 grams.
Explanation:
The radioactive elements all have a specific half-life. Each element's half-life is well known, and they are used by scientists of numerous fields as they are excellent for determining the age of a particular item, be it or organic or non-organic nature. In this case, we have a radioactive element with a half-life of 1,000 years, and starting mass of 20 grams.
The half-life basically means that half of the mass of an element is lost during a particular period of time. For the element in question we need to find out how much time will be needed for it to decrease to 5 grams. In order to get to the result, we just need to add 1,000 years on every decrease of half of the mass:
20/2 = 10
10/2 = 5
So in 1,000 years, the element in question will decrease to 10 grams, and in further 1,000 years (2,000 cumulatively) it will decrease to 5 grams.
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Answer:
GDP measures the market value of the goods and services a nation produces. So, When GDP is growing quickly, you often see more jobs, rising wages, and better profits for businesses.