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

Evaluate the expression 8 x 1. 5

A marathon had 618 runners registered. Of these runners, about 0.8% completed the race in under 2 h 15 min. a) How many runners completed the race in this time?

Select the values that make the inequality m 4 true. Then write an equivalent inequality, in terms of m. (Numbers written in order from least to greatest going

Consider the polynomial function p(x)=-5x^6-3x^5+4x^2+6xp(x)=−5x 6 −3x 5 +4x 2 +6xp, left parenthesis, x, right parenthesis, equals, minus, 5, x, start su

Plot A(2,3) and B(2,5). What is the midpoint of points A and B?

96 members are going to pass a resolution to select a team leader. If 1/6 of the members voted in favor and 2/5 of the members voted against how many did not vo

Salmon often jump waterfalls to reach their breeding grounds. Starting downstream, 3.02 m away from a waterfall 0.258 m in height, at what minimum speed must a

Isla, Bob and Marie are playing a game involving counters. The total number of counters stays the same throughout the game. At the start of the game, the ratio

For each function f, find f^-1 and f^-1(5). f={(-1,5), (0,0), (2,6)}

simplify fully 40/56