LukeIAMJOHNCENA LukeIAMJOHNCENA

04-01-2017
Physics

contestada

Suppose you left your lawn mower out all winter, and it is very rusty. Of your 250,000J of work, only 100,000J go towards cutting the lawn. What is the efficiency of the lawn mower now?

A 40%
B 0.4%
C 0.04%
D 4%

REMINDER: PLEASE SHOW YOUR WORK!!!

Respuesta :

04-01-2017

Efficiency =

   (useful work you get out of it) / (work you put into it)

   = (100,000 J) / (250,000 J)

   =    0.4 = 40%    (choice-A)

Answer Link

Otras preguntas

Cory's average score after 8 tests is 91%. If he gets a 78% on his 9th test what will his new average be? How do i figure out this problem?

Two number cubes are rolled --one blue and one yellow. Find the probability that the blue cube is less than 3 and the product is 8.

The area of a square field is 200 square feet. What is the approximate length of each side of the field? Round your answer to the nearest foot.

How do you put 0.8918 as a fraction

How many $0.21 pencils can be purchased for $7.00? Show your work.

Suppose the slope of a line is positive. Describe what happens to the value of x as the value of y increases

what is tn=6n-9.5,t15

Which words in the sentence make up the appositive phrase? The winner of the art contest was Tiffany, my youngest cousin. A. was Tiffany B. of the art contes

What activities can you do on Jupiter?!

Jane likes to sunbathe She has read about risks from sunbathing and how to reduce them. She thinks she is not at risk from sunbathing because she has dark skin.