Williamsburg20030325 Williamsburg20030325

15-02-2017
Physics

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 :

LilacMoon101 LilacMoon101

15-02-2017

I believe that if you multiply 120 x 45 you would get 5,400 why? Because when a problem has "of" means to multiply.

So... the vacuum cleaner is 5,400 percent efficient :)

Sorry if it's wrong I'm only in fifth grade

Answer Link

Otras preguntas

Why did militarism make it more difficult to avoid the outbreak of war

What historical event helped to spark the Harlem Renaissance and how?

Given the equation representing a reaction at equilibrium: N2(g) + 3H2(g)==> 2NH3(g) + energy Which change causes the equilibrium to shift to the right? (1)

Two spherical balloons are filled with water. The first balloon has a radius of 3 cm, and the second has a radius of 6 cm. How much more water is in the larger

Why did militarism make it more difficult to avoid the outbreak of war

After chromosomes are formed, during which phase of mitosis do the chromosomes attach to the spindle fibers by their centromeres?

Every day, Navya's teacher randomly picks a number from 1 to 80 to be the number of the day. The number of the day can be repeated. There are 180 days in the sc

What is the oxidation state of nitrogen in the compound NH4Br? (1) –1 (3) –3 (2) +2 (4) +4

A sample of Ca(OH)2 is considered to be an Arrhenius base because it dissolves in water to yield A. Ca2+ ions as the only positive ions in solution B. H3O+ ions

What is the total charge of the nucleus of a carbon atom? (1) –6 (3) +6 (2) 0 (4) +12