« previous next »

Author Question: How to get the power rating in Watts from a label? (Read 1909 times)

j_sun

  • Sr. Member
  • ****
  • Posts: 384
on: Jun 25, 2013
Okay so my Science homework is like this Energy Audit thing and I've got the formulas to calculate stuff if I input the power rating in watts for each appliance anyway my computer says 50hz 5Amps 240v (Australian Outlet Voltage by the way) so I can I can calculate the power rating in watts from this


Millan

  • Sr. Member
  • ****
  • Posts: 368
Reply #1 on: Jun 25, 2013
W = V * A. So W = 5 * 240


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Jones

  • Full Member
  • ***
  • Posts: 145
Reply #2 on: Jun 25, 2013
You can calculate Wattage by multiplying voltage and current (5*240=1200W). You mention that its a project on energy. Just an fyi energy is wattage over a time period. So you would need to multiply that over the time the computer is on. Most cases it's in kWh so watch your units...


TI

  • Sr. Member
  • ****
  • Posts: 434
Reply #3 on: Jun 25, 2013
Equal 1200 watts maximum power can be used from each outlet.


TI

  • Sr. Member
  • ****
  • Posts: 434
Reply #4 on: Jun 25, 2013
The formula for watts (not VA) is W=(240 *5)*Power Factor.

The power factor of a computer is less than 1, so the watts will be less than 1200.

Your computer is rated at 1200 VA (volt-amperes).

TexMav


« previous next »
 

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Plant cell to Label Plant cell to Label
Heart Label Blank Heart Label Blank
Wind Power Wind Power
Cylinder Power Balance Test Cylinder Power Balance Test
The Wong-Baker “Faces” pain rating scale The Wong-Baker “Faces” pain rating scale
Drug Label for Doxazosin Mesylate Drug Label for Doxazosin Mesylate
Video: Membrane Protein and Facilitated Transport (Passive Vs Active)

For a complete list of videos, visit our video library