History, 09.10.2019 23:00 mariah8926

What is a characteristic of all fuel cells?
the
energy from the sun is converted into electricity.
electrical energy is produced from oxidation reactions.
oxidation reactions are used to produce thermal energy.
a constant source of energy itt not required.

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Answer from: Quest

answer: this problem has only trivial solutions, with all points on the same line. x=5 or x=7/5.

step-by-step explanation:

there are three triangles, and three unknowns: x, y=length of middle segment, and z=cos(angles marked with red arc).

we need

$\cos(2\gamma)=(2\cos(\gamma)^2-1)$

and law of cosines,

$c^2=a^2+b^2-2ab\cos(\gamma)$

the three equations are

$(2x-1)^2=9^2+y^2-2(9yz)$

$(3x)^2=15^2+y^2-2(15yz)$

$(3x+2x-1)^2=9^2+15^2-2(9\times15(2z^2-1))$

see attached image for solution.

What is the value of x? enter your answer in the box. x =

Answer from: Quest

can someone just answer this

Answer from: Quest

the united states presidential election of 1912 was the 32nd quadrennial presidential election, held on tuesday, november 5, 1912. the election was a rare four-way contest.

incumbent president william howard taft was renominated by the republican party with the support of its conservative wing. after former president theodore roosevelt failed to receive the republican nomination, he called his own convention and created the progressive party (nicknamed the "bull moose party"). it nominated roosevelt and ran candidates for other offices in major states. democrat woodrow wilson was finally nominated on the 46th ballot of a contentious convention, to the support of william jennings bryan, the three-time democratic presidential candidate who still had a large and loyal following in 1912. eugene v. debs, running for a fourth time, was the nominee of the socialist party of america.

wilson won the election, gaining a large majority in the electoral college and winning 42% of the popular vote, while roosevelt won 27%, taft 23% and debs 6%. wilson became the only elected president from the democratic party between 1892 and 1932, and the second of only two democrats to be elected president between 1860 and 1932. this was the last election in which a candidate who was not a republican or democrat came second in either the popular vote or the electoral college, and the first election in which all 48 states of the contiguous united states participated.

hope this !

-austint1414

Answer from: Quest

i normally just use

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What is a characteristic of all fuel cells?
the
energy from the sun is converted into e...

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