Farmers in developing countries claim that the united states government, through farm subsidies, is responsible for the artificially low global price of wheat. because the u. s. government buys whatever wheat american farmers are unable to sell on the open market, american farmers have no incentive to modulate the size of their crops according to the needs of the global market. as a result, american farmers routinely produce more wheat than the global market can absorb and the global price of wheat is kept low. without these subsidies, the farmers in developing economies claim, american farmers would produce only the amount of wheat that they could sell on the open market and the global price of wheat would rise.

which of the following, if true, most weakens the claims of the farmers in developing countries regarding the price of wheat?

(a) wheat that is not processed for consumption can be used for certain industrial applications.
(b) non-governmental buyers of wheat and wheat products are able to predict how much wheat they will need several years in advance.
(c) the united states government offers similar subsidies to soybean farmers, though the global price of soybeans is significantly higher than that of wheat.
(d) other countries, such as canada and russia, are likely to produce more wheat if the united states were to reduce its output.
(e) the price of sorghum, a crop for which the united states government offers no subsidies, is lower than that of wheat.

sound is invisible, but sometimes we can feel it. when a kettle-drum is thumped with a stick that time the tight drum skin moving up and down very quickly for some time and then it pumped sound waves into the air. loudspeakers also work in a similar manner.

components of a speaker:

electromagnet

in order to translate an electrical signal into an audible sound, an electromagnet is used in looudspeakers

  suspension

suspension is used to   center the voice coil in the gap of the magnet and it exerts a restoring force to keep it there. suspension is used to limits the maximum mechanical excursion of the diaphragm and voice coil.

voice coil

voice coil is a coil of wire which is attached to the apex of a loudspeaker cone. it provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

cone

in a   loudspeaker, a   thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap due to which it vibrates   and produced sound. it is known as diaphragm and it can also be called a cone, though not all speaker diaphragms are cone-shaped.

surround

surround is also known as front suspension. surround is used to join the cone to the chassis. together with the suspension it controls the cone excursion, and it is also used to   determine how energy which is   travelling through the cone is absorbed, and how the speaker limits when it reaches the ends of its travel.

dustcap

dustcap is used to protect the voice coil from dust and dirt. it is a part of the cone.

how speaker work

the outer part of the cone is fastened to the outer part of the loudspeaker's circular metal rim. the inner part is fixed to   voice coil that sits just in front of a permanent magnet . when loudspeaker is hooked up to a stereo, electrical signals feed through the speaker cables into the coil. it will convert the coil into an electromagnet magnet . when electricity flows back and forth in the cables, the electromagnet either repels or attract the permanent magnet. this moves the coil back and forth, and it pull and push the loudspeaker cone. like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.in this way loudspeakers works.

c

explanation:

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