Williamsburg20030325 Williamsburg20030325
  • 15-02-2017
  • Advanced Placement (AP)
contestada

Suppose a vacuum cleaner uses 120 J of electrical energy. If 45 J are used to pull air into the vacuum cleaner, how efficient is the vacuum cleaner?

Respuesta :

elizebeth77
elizebeth77 elizebeth77
  • 21-02-2017
Power efficiency is defined as the ratio of the output power divided by the input power:
Efficiency= out/in • 100%
So, (120 - 45)J / 120J • 100% = 62.5%
Answer Link

Otras preguntas

Evaluate the following expression: 7.0 x 10⁴ + 6.0 x 10³ A) 13 x 10⁷ B) 42 x 10⁷ C) 67 x 10³ D) 76 x 10³
Create a newspaper article about visiting the great exhibition, London.Could anyone please give me some points that I could include.Thank you
put sequence into a sentence
what is the 52nd number of pi?
What is 7/10 - 1/4 (fraction)
wht is the ocelot favorite food?
Round the following numbers to 2 decimal places 0.2731.5956.4732.5710.42544.556482.3643325.1741
Create a newspaper article about visiting the great exhibition, London.Could anyone please give me some points that I could include.Thank you
How do you get a liquid to a gas?
{–½, 2} {–½, –2} {½, 2} {½, –2} Use the quadratic formula to solve 2y2 – 5y  = –2.