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abruzzese [7]
3 years ago
15

Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. what is helen most l

ikely trying to do?
Chemistry
2 answers:
Zanzabum3 years ago
4 0

Answer: Helen is trying to increase the current through an electric generator.

Explanation:

Electric generator is a device that converts mechanical energy to electrical energy.

The main functions of the armature are: To generate an electromotive force and to create a shaft torque in a rotating machine. By changing the number coils around an armature, the electric current can be increased or decreased.

In the given problem, Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. She is trying to increase the current through an electric generator.

Veseljchak [2.6K]3 years ago
3 0
Increase the amount of current

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Calcium has an Atomic number of 20 and Atomic mass of 40.078 u

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The length of time required for half of the radioactive atoms in a sample to decay is its. A. half-life. . B. relative date. . C
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How many moles of water are produced when 3.0 moles of hydrogen gas react with 1.8 moles of oxygen gas?
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There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. In
adell [148]

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The net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide is 523.2 kJ.

Explanation:

Step 1:

CaC_2(s) + 2H_2O(g)\rightarrow C_2H_2(g) + Ca(OH)_2(s),\Delta H_1=414.0 kJ...[1]

Step 2 :

6C_2H_2(g) + 3CO_2(g) + 4H_2O(g)\rightarrow 5CH_2CHCO_2H(g) \Delta H_2=132.0kJ..[2]

Adding 6 × [1] and [2]:

6CaC_2(s) + 12H_2O(g)\rightarrow 6C_2H_2(g) + 6Ca(OH)_2(s)

6C_2H_2(g)+3CO_2(g)+16H_2O(g)\rightarrow 5CH_2CHCO_2H(g)

we get :

6CaC_2(s) + 8H_2O(g)+3CO_2(g)\rightarrow 5CH_2CHCO_2H(g)+ 6Ca(OH)_2(s),\Delta H'=?

\Delta H'=6\times \Delta H_1+\Delta H_2

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Energy released on formation of 1 mole of acrylic acid:

\frac{ 2,626 kJ}{5 } = 523.2 kJ

7 0
3 years ago
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