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2 years ago

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when oxygen reacts with hydrogen it has the capacity to release 29 kilojoules of energy. Inside a fuel cell, oxygen reacts with

hydrogen to produce 23 kilojoules of useful energy. The rest of the energy is lost as heat. Whats the efficiency percent of the fuel cell?

1 answer:

Pepsi [2]2 years ago

4 0

Answer:

79

Step-by-step explanation:

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PLEASE HELP BRAINLIEST PLUS POINTS!!!!!!!!!!!!!!!!!!!

tankabanditka [31]

Answer:

x = 24

y = 19

Step-by-step explanation:

2x - 8 = x + 16

x - 8 = 16

x = 24

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Which of the following fractions is nearest to 1/2

Zinaida [17]

Answer:

12/25

Step-by-step explanation:

1/2 = 25/50

1) 3/5 = 30/50

2) 12/25 = 24/50 (closest to 25/50)

3) 27/50

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2 years ago

What equation is graphed in this figure?

aniked [119]

Based on the graph, the slope is -3, and the y-intercept is 1. So your equation should be:

y = -3x + 1

The answer is C

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y + 2 = -3x + 3

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What is the area of a regular nonagon with 10 cm sides and an apothem if 6cm?

bearhunter [10]

Answer:

The area of the nonagon is 270cm²

Step-by-step explanation:

The area of a regular polygon is given by

$= \frac{1}{2} ap$

where 'a' is the apothem and 'p' is the perimeter.

The apothem is a=6cm.

The perimeter is p=9×10=90cm.

We substitute the apothem and the perimeter to get:

$= \frac{1}{2} \times 6 \times 90 {cm}^{2}$

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2 years ago

What is the word form for the number 2,059

gulaghasi [49]

Two-thousand and fifty-nine

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