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

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

Mike smith's stockbroker has informed him of substantial investment losses. when mike tells his wife, she angrily responds, "i could have told you that your inv

In a 30-60-90 triangle, what is the length of the hypotenuse when the shorter leg is 5 cm? Enter your answer in the box.

How does a volcano form?

Shira tells her friend that she wants to take diet pills. Which facts might Shira’s friend provide to change Shira’s mind? Check all that apply.

You have been mining for gold and you have found a nugget and are about to be rich. The density of the gold is 19.3 grams/cubic centimeter or g/cc. Your sample

Create an equation to model a population of cells which starts with 10 cells and doubles in size every day. How many days will it take to reach 1,000,000 cells?

Which choice is the conjugate of the expression below when x -5? 4 - x+5 A. 4 + x - 5 B. 4 - x - 5 C. 4 - x + 5 D. 4 + x + 5

Napisz krótką opowieść romantyczną

Adele is paid a weekly salary of $685. She is paid an additional $23.50 for every hour of overtime she works. This week her total pay, including regular salary

Determine the values of n for which f(x)=x^2 has an inverse that is a function. Assume that n is a whole number.