« previous next »

Author Question: How to get the power rating in Watts from a label? (Read 1567 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?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Labeling of black cohosh: (a) front label with general health claim Labeling of black cohosh: (a) front label with general health claim
Label the cutbank and point bar on this image. Label the cutbank and point bar on this image.
Number and label designations for oxygen sensors. Bank 1 is the bank where cylinder number 1 is ... Number and label designations for oxygen sensors. Bank 1 is the bank where cylinder number 1 is ...
Soup’s On! Nutrient claims on the food label must meet strict FDA criteria Soup’s On! Nutrient claims on the food label must meet strict FDA criteria
Milk Label Containing Information about the Use of rBGH Milk Label Containing Information about the Use of rBGH
During a period of high power demand, the voltage output of the power company is reduced by ... During a period of high power demand, the voltage output of the power company is reduced by ...
Video: Introduction to Pre-eclampsia

For a complete list of videos, visit our video library