1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Raising temp of air

  1. Sep 16, 2009 #1
    A 1500-W heater is designed to be plugged into a 120-V outlet.

    How long does it take to raise the temperature of the air in a good-sized living room (3m x 5m x 8m) by 10.0 degrees C. Note that the specific heat of air is 1006 J/kg and the density of air is 1.20 kg/m^3.

    I=12.5 A
    R=9.6 ohms

    I found I and R but don't know the equation to solve this last part
    Last edited: Sep 16, 2009
  2. jcsd
  3. Sep 16, 2009 #2


    User Avatar
    Homework Helper

    What is the formula for calculating the heat gained by the air?
  4. Sep 17, 2009 #3
    (mass) x (specific heat) x (chang in temp)?
  5. Sep 17, 2009 #4
    How much energy does it take to raise the room temperature? You need to answer that question.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook