« previous next »

Author Question: How to get the power rating in Watts from a label? (Read 1911 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?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Table 6.1 illustrates the main regime types and their differences. It breaks the regimes into four Table 6.1 illustrates the main regime types and their differences. It breaks the regimes into four
There is an inherent power differential between massage therapists and their clients. There is an inherent power differential between massage therapists and their clients.
The Hazardous Materials Identification System is used to label containers that hold hazardous ... The Hazardous Materials Identification System is used to label containers that hold hazardous ...
Hydroelectric power: 2013 Global Market Hydroelectric power: 2013 Global Market
The USDA Organic Seal Foods Label The USDA Organic Seal Foods Label
Physics: Power, Energy and Time Physics: Power, Energy and Time
Video: Interspecific Competition Relationship - Competitive & Niche Differentiation

For a complete list of videos, visit our video library