Physics

The total U.S. consumption of electricity in a particular year was 5.0 x 10^12 kilowatt-hours. What is the mass equivalence of this amount of energy? Show all calculations leading to an answer.

How would I solve it?

  1. 👍 0
  2. 👎 0
  3. 👁 77
asked by Alea
  1. E = m c^2
    c^2 = (3*10^8)^2 = 9 * 10^16

    E = 5 * 10^15 watts * 3600 seconds
    = 18 * 10^18 Joules

    m = 18*10^18/9*10^16
    = 2 * 10^2
    = 200 Kg
    about two big people mass :)

    1. 👍 0
    2. 👎 0
    posted by Damon
  2. could you explain how you got your answer..step by step

    1. 👍 0
    2. 👎 0
    posted by Alea
  3. I thought I did :)

    surely you can google E = m c^2
    (Albert Einstein)
    there
    E is in Joules which is watt seconds
    c is speed of light, about 3*10^8 meters/second
    an hour is 3600 seconds
    a kilowatt is 1000 watts which is 1000 Joules/second

    1. 👍 0
    2. 👎 0
    posted by Damon
  4. thank you so much! :)

    1. 👍 0
    2. 👎 0
    posted by Alea

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics

    6. According to the records of Enersource, an electric company serving the Mississauga area, the mean electricity consumption for all households during winter is 1650 kilowatt-hours per month. Assume that the monthly electricity

    asked by david on June 23, 2013
  2. Physics

    The total U.S. consumption of electricity in a particular year was 5.0 x 1012 kilowatt-hours. What is the mass equivalence of this amount of energy? Show all calculations leading to an answer.

    asked by Lexi on December 4, 2015
  3. statistics

    The quarterly seasonal indexes for a firm’s electricity consumption are 115, 92, 81, and 112 for quarters I-IV. It has been forecast that electricity consumption will be 850,000 kilowatt-hours during 2008. Forecast electricity

    asked by Yadira M on August 16, 2009
  4. pre cal

    Electricity Rates in Florida. Florida Power & Light Company supplies electricity to residential customers for a monthly customer charge of $5.69 plus 8.48 cents per kilowatt-hour for up to 1000 kilowatt-hours. (a) Write a linear

    asked by kisha on January 15, 2014
  5. math

    Consumers pay for electricity by the kilowatt-hour (the amount of electricity used by a 1,000-watt appliance in one hour). If electricity costs 10cents per kilowatt-hour, what is the cost of running a 100-watt lamp for 1. 1 hour?

    asked by Mike on December 7, 2010
  6. Science asap!!!

    This question is about energy efficiency. e.g. more efficient A= B C D E Less Efficient my question An old freezer has an energy consumption per year of 350kwh use the equation in the box to calculate the extra cost of using the

    asked by HS on September 20, 2013
  7. math

    Power companies typically bill customers based on the number of kilowatt-hours used during a single billing period. A kilowatt is a measure of how much power (energy) a customer is using, while a kilowatt-hour is one kilowatt of

    asked by HELLO on March 9, 2013
  8. Algebra 1- Please help whenever you get the chance

    The monthly cost of electricity in Smithville is determined by the function C(e) = $0.16e + $24.54, where e is the amount of electricity used in kilowatt-hours (kWh) and C(e) is the total cost. If the Fox family used 872 kWh of

    asked by basketball&batman on November 24, 2015
  9. Fairmont

    Last month, your electric bill was $25.32 for 450 kilowatt-hours of electricity. At that rate, what would be the bill for 240 kilowatt-hours?

    asked by Rose on February 27, 2012
  10. algebra

    Last month, your electric bill was $25.32 for 450 kilowatt-hours of electricity. At that rate, what would be the bill for 240 kilowatt-hours?

    asked by Jazmin on April 29, 2011

More Similar Questions