Physics

A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 x 10^6 kg/s, what is the rise in temperature of the flowing water?

  1. 0
  2. 0
  3. 20
asked by Stefan
  1. Energy converted to heat
    = 1200*10^6W/0.31
    =3.87*10^9W
    =3.87&10^9 j/s
    Now divide by 4.18 to convert to cal/s
    and divide by the mass of water (in grams) per sec. to get the increase in temperature in °C.

    1. 0
    2. 1
    posted by MathMate
  2. Thanks for your help. For the answer I got it to be 0.925837321 by following your directions. When I submitted it to my online homework it said the answer was wrong and off by more than 10%.

    1. 0
    2. 0
    posted by Stefan
  3. Good Lord. How did you get .925 from 3.87E9/4.18 ?

    1. 0
    2. 0
    posted by bobpursley
  4. By taking 3.87E9/4.18 then dividing it by the flow rate of the water (1.0E6 kg/s = 1.0E9 g/s)

    1. 0
    2. 0
    posted by Stefan
  5. I see the error.

    Energy produced+heat=total

    but it is given that energy produced/total is .31, which means heat produced is .69 of energy produced, so..

    heat produced= .69*1200*10^6W/0.31

    Now do the conversions.
    check my thinking.

    1. 0
    2. 0
    posted by bobpursley
  6. Thanks for your help! I got the correct answer

    1. 0
    2. 0
    posted by Stefan
  7. Sorry Stefan, and thank you Bob!

    1. 0
    2. 0
    posted by MathMate

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 multiplied by 10^6 kg/s, what is the rise

    asked by Chelsea on December 4, 2010
  2. Physics

    A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 multiplied by 10^6 kg/s, what is the rise

    asked by Chelsea on December 4, 2010
  3. physics

    A nuclear power plant has an electrical power output of 1900 MW and operates with an efficiency of 32%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 106 kg/s, what is the rise in temperature

    asked by Annette on April 29, 2013
  4. science help PLS

    A nuclear power plant produces huge amount of electricity. However, it dumps radioactive wastes into the sea. This has led to an increase in illness among people living along the coast. Which of these is the best method to solve

    asked by Oscar on April 12, 2016
  5. Science

    In order to sail through the frozen Artic Ocean, the most powerful icebreaker ever built was constructed in the former Soviet Union. At the heart of the ship's power plant is a nuclear reactor with a power output of 5.60X10^7 W

    asked by Lilly on March 3, 2010
  6. intro of my essay

    Nuclear power plants have been a controversy issue in our world for many years and it will continue to be so in the years to come. The issue of whether people should or shouldn’t accept power plants to be operated has been

    asked by julie on October 30, 2007
  7. Physics

    A power plant burns coal and generates an average of 630.0 MW of electrical power while discharging 1058.40 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period.

    asked by Nika on January 6, 2014
  8. PHYSICS NEED HELP FAST

    A power plant has a power output of 1055 MW and operates with an efficiency of 33.0 percent. Excess energy is carried away as heat from the plant to a nearby river that has a flow rate of 1.1 x 10^6 kg/s. How much energy is

    asked by ricki on March 2, 2011
  9. Physics

    A fossil-fuel power plant that generates 1000MW of electrical power discharges 1600MJ per second as waste heat into the river. A)At what rate(in MW) is thermal energy obtained fromt the burning of coal? B)What is the thermal

    asked by Devon on May 4, 2011
  10. Environmental Science

    A nuclear burning power plant produces a total power of 1.1kW. It serves a community that requires 2.85 x 107 kJ of power over the entire year. How many days per year does the power plant need to operate to provide all this power?

    asked by Kayla on December 22, 2013

More Similar Questions