1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
igor_vitrenko [27]
3 years ago
8

a machine has an efficiency of 70 percent, how much work does the machine do when 20000 j of work is done on it a. 14000 b. 2060

0 c. 1400000 or c. 2860000
Physics
1 answer:
Vlad [161]3 years ago
4 0

Answer:

a. 14000

Explanation:

Given parameters:

Efficiency of the machine  = 70%

Work done on machine  = 20000J

Unknown:

Work done by machine = ?

Solution:

 Efficiency of a machine is determined by;

  Efficiency  = \frac{Work done by machine}{Work done on machine}  x 100  

   70  = \frac{Work done by machine}{20000} x 100

   

   70  = \frac{work done by machine}{200}  

 Work done by machine  = 70 x 200 = 14000J

You might be interested in
A 35 kg chair is lifted 5M off the ground. what is the potential energy?
patriot [66]

Answer:

mass × gravity ×height. so....that.. Ep = mgh. Ep= 35×9.8×5. Ep = 1715.

Explanation:

8 0
2 years ago
a charge of 4.5 times 10 to the negative 5 C is placed in an electric field with a strength of 2.0 times 10 to the 4 N over C. i
Rama09 [41]

Answer:

C

Explanation:

7 0
3 years ago
With what force will a car hit a tree if the car has a mass of 3,000 kg and an acceleration of 2m/s squared
julsineya [31]

Answer:

<h2>6000 N</h2>

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 3000 × 2

We have the final answer as

<h3>6000 N</h3>

Hope this helps you

7 0
3 years ago
Read 2 more answers
Which statement about the ellipsis is true?. . I. An ellipsis indicates the omission of a word or words.. . II. It is appropriat
V125BC [204]
<span>"the true statement is: An ellipsis indicates the omission of a word or word Here is an example on the usage of ellipsis: I don't know . . . i'm not even sure how i feel about him. The dots acted as an interlude that connected one response with another statement</span>
7 0
3 years ago
Read 2 more answers
What is the difference between magnitude and intensity
MArishka [77]
The difference is intensity is assessed using a special scale and magnitude is measure of the size ( for example a earthquake)
4 0
3 years ago
Other questions:
  • Discuss renewable and nonrenewable resources. Give at least two advantages and two disadvantages of each. (4 points)
    15·1 answer
  • What determines the type of the image formed after refraction from a convex lens?
    10·2 answers
  • A cube has a mass of 100 grams and its density is determined to be 1 g/cm3. The volume of the cube must be
    11·1 answer
  • The function of the ___________________ system is to keep the human species on this planet.
    13·1 answer
  • A researcher measured the absorbance and % transmittance of a blue dye at light wavelengths between 425 and 700 nm. the measurem
    8·2 answers
  • How does electromagnetic affect people in the world ?
    13·1 answer
  • Which part of the microscope is responsible for enlarging the specimen?
    5·2 answers
  • Can someone help me with this question
    6·1 answer
  • Suppose you drop a superball of massMand a marble of mass m(both treated as point masses) from a heighthwith the marble just on
    6·1 answer
  • A bucket is full of oil. The total mass of the bucket of oil is 5.4kg and the gravitational field strength is 10N\kg. Calculate
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!