An electromagnet will remain magnetized only as longer as electricity flows through it

Câu hỏi liên quan

• Choose the correct answer to complete the sentence. "He was admired for _____ donated a lot of money to environmental protection campaigns"

• On February 20th, 1962, “Friendship 7” orbiting the Earth in a manned flight that lasted just under five hours

• I put my new book of zoology here on the desk a few minutes ago, but I cannot seem to find it.

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• You have to use a magnifying glass so that to see some of the minute details.

• If the water level has raised a little higher, the dam would probably have broken

• The graphics ability of a computer depend on the speed of its processor and the size of its RAM

• It is large island, few people live there, though.

• Everyday in summer, but especially at the weekends, all kinds of vehicles bring crowds of people to enjoy the various attraction.

• The local economy which once used to be in crisis now depends to a great extent on menial jobs provided by the recent development of ecotourism.

• Because of its vast tracts of virtually uninhabited northern forest, Canada has one of the lowest population density in the world

• Colleges in the newly formed United States, in recovering from the adverse effects of the American Revolution, inaugurated a broad curriculum in response of social demands.

• The native people of the Americans are called Indians because when Columbus landed in the Bahamas in 1492 , he thought that he has reached the East Indies.

• Southern California, is known for its mild winters, has become the new home for many senior citizens escaping the hard Northern winters.

• I think he will come here, _    ?

• Chocolate is prepared by a complexity process of cleaning, blending and roasting cocoa beans, which must be ground and mixed with sugar.

• The brothers Grimm intended their fairy tales to be studied by scholars of German literature and not to enjoy as simple stories by children

• In 1984, the world population rose to over 4.7 billion, up almost 85 million from an estimate made the year ago.

• The waste from the chemical factory is extremely .......

• The workers are building a new bridge which is 150 meters in high.

• Choose the correct answer to complete the sentence. "With clear evidence, his company couldn't deny having _____ a large quantity of toxins into the sea."