1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Helga [31]
3 years ago
10

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?
Mathematics
1 answer:
Pepsi [2]3 years ago
4 0

Answer:

79

Step-by-step explanation:

You might be interested in
Ms. Vicker is trying to save enough money to buy her wedding dress at the cost of $1,200. She has $600 saved from her summer sch
sattari [20]

Answer:

The inequality to determine how many hours Ms. Vicker must tutor to have enough money for the dress.

$600 + 10x ≥ $1200

Step-by-step explanation:

From the question, we are told that:

Ms. Vicker is trying to save enough money to buy her wedding dress at the cost of $1,200. She has $600 saved from her summer school job.

The amount to make up to complete her wedding dress = $1200 - $600

= $600

To make the rest of the money, Ms. Vicker plans to tutor for Sylvan at a cost of $10 per hour.

= Number of hours Ms vicker must tutor Sylvan to make $600 is calculated as:

$600/$10 = 60 hours

The inequality to determine how many hours Ms. Vicker must tutor to have enough money for the dress is written as

$600 + 10x ≥ $1200

4 0
3 years ago
Choose the best decimal equivalent to 5/8
vlada-n [284]

To convert this fraction to a decimal, just divide the numerator (5) by the denominator (8): 5 ÷ 8 = 0.625. So,

5/8 = 0.625

Rounded values:

<span><span>5/8 = 1 rounded to the nearest integer</span><span>5/8 = 0.6 rounded to 1 decimal place</span><span>5/8 = 0.63 rounded to 2 decimal places</span></span>
5 0
3 years ago
Read 2 more answers
If 1 mile is equal to 1.6 kilometers, convert 50 kilometers to miles.
Free_Kalibri [48]
1 mile = 1.6 km
x = 50 × 1.6
x = 80 miles
4 0
3 years ago
Find the measure of b.
Lyrx [107]

Answer:

105

Step-by-step explanation:

55+50+x=180

x=75 this is the other inside angle. to find b, you need to take 75 and subtract it from 180. this is because a straight line is equal to 180 degrees

6 0
3 years ago
Which phrase describes an unknown or changeable quantity? A. 60 seconds multiplied by 5 B. 2 times the number of pages in the bo
Anna [14]
A.) cause you can’t take away or add seconds
8 0
3 years ago
Read 2 more answers
Other questions:
  • Giorgio is taking a true or false quiz there are six questions on the quiz how many ways can the quiz be answered
    11·1 answer
  • Naomi has earned $54 mowing lawns
    5·1 answer
  • The number 0.0000000726 is equivalent to which of the following expressions?
    15·2 answers
  • Liev is assembling a coffee table. The diagram below is from the instruction manual and shows the table after the first two legs
    11·1 answer
  • Hollys garden is divided into 5 equal sections. She will fence the garden into 3 areas by grouping some equal sections together.
    13·1 answer
  • Which equation represents the line that passes through the point (-1 -2) and (3 10)
    12·1 answer
  • Simplify: 5^ -3 • 5^ 5<br><br> 25^ 8<br> 25^ -15<br> 5^ -3<br> 5^ 2
    10·2 answers
  • If Jim works at Fire Fighting Equipment, has $32,874 in sales in one week, and as paid a weekly salary of $452 plus a commission
    6·1 answer
  • PLEASE HELP WITH THIS PLEASE.
    12·1 answer
  • Which of the following statements about the graph of f (x)=(0.5)^x shown above are true? Select all that apply.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!