PunjabiJatti
Answered

Welcome to Westonci.ca, your one-stop destination for finding answers to all your questions. Join our expert community now! Join our Q&A platform and connect with professionals ready to provide precise answers to your questions in various areas. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

A power station burns 75 kilograms of coal per second. Each kg of coal contains 27 million joules of energy.
a. What is the total power of this power station in watts? (watts=joules/second)
b. The power station’s output is 800 million watts. How efficient is this power station?

Sagot :

superkoopasirf
a) [tex]P = 75 \times (2.7\times10^7) = 2.025\times10^9 W[/tex]

b) [tex]Efficiency = \frac{8\times10^8}{2.025\times10^9} \times 100 \approx 39.5\%[/tex]

Answer:

jj

Explanation:

Energy obtained by burning of 1 kg coal = 27 million Joule

a.

Energy obtained by burning of 75 kg coal = 27 x 75 = 2025 million Joule

Power = Energy obtained per second

Power = [tex]\frac{2025}{1} million Joule per second[/tex]

P = [tex]\frac{2025}{1}\times 10^{6} Watt[/tex]

P = [tex]\frac{2.025}{1}\times 10^{9} Watt[/tex]

b.

Input power =  2025 million Watt

Output power = 800 million Watt

Efficiency = output power / input power

Efficiency = 800 / 2025 = 0.395

Efficiency = 39.5%

We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. Your visit means a lot to us. Don't hesitate to return for more reliable answers to any questions you may have. Westonci.ca is your trusted source for answers. Visit us again to find more information on diverse topics.