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
soldi70 [24.7K]
3 years ago
8

A machine designed to stretch a stiff spring uses 1,550 J of energy to stretch the spring. If the work output is 1,200 J, what i

s the machine’s efficiency?
Physics
1 answer:
lapo4ka [179]3 years ago
8 0

Answer:

77%

Explanation:

efficiency= work output/work input X 100%

e = 1,200j/ 1,550 j x100%

e = 1,200/1,550= 0.77

e = 0.77 x 100%

e = 77%

You might be interested in
The current through two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resista
Rus_ich [418]

The resistance of a single light bulb is 220 ohms per bulb.

<h3>What is Ohm's Law?</h3>

Ohm's Law is a formula used to determine how voltage, current, and resistance in an electrical circuit relate to one another.

Ohm's Law (E = IR) is as basic to students of electronics as Einstein's Relativity equation (E = mc2) is to physicists.

E = I x R

The formula reads voltage = current x resistance, or V = A xΩ., or volts = amps x ohms.

110volts divided by .25amps = 440 ohms. 440 divided by 2 =220 ohms per bulb.

R = 110/(2*0.25) = 220 ohms

to learn more about Ohms law go to - brainly.com/question/14296509

#SPJ4

4 0
2 years ago
Middle adulthood marks the time period in which some adults face the fabled midlife crisis. What exactly is that? Do you think y
MariettaO [177]

<span>The middle life crisis occurs for men at age of 39 and for women at age of 44. At this age, people start realizing that they are getting older and experience some physical changes which seem distressful for them.</span>

<span> It affects the sense of accomplishment and progress in career. Due to a midlife crisis, people start engaging in activities to cope with the reality such as wearing clothes that are fashionable, dating someone etc. Yes, I think I will also go through one because it happens with everyone in this age.  It can be avoided by accepting the fact that these changes are reality and everyone have to face it one day.</span>

6 0
3 years ago
Reggie can do 50 pushups in one minute. If the mass that Reggie is lifting which each push-up is at 92 kg, what must also be mea
Sergio039 [100]
The missing measurement is distance.
8 0
3 years ago
Having greater biodiversity in an ecosystem is beneficial to humans because
11Alexandr11 [23.1K]

Answer:

The answer is A

Explanation:

4 0
3 years ago
Read 2 more answers
What do MRI and ultrasound have in common as diagnostic imaging techniques? Check all that apply.
Gennadij [26K]

Answer:

low risk for tissue damage

uses radio waves

the last three are not correct

:)

8 0
3 years ago
Read 2 more answers
Other questions:
  • Consider this situation: A rope is used to lift an actor upward off the stage. Of the forces listed, identify which act upon the
    13·2 answers
  • How do the units that are used to measure heat differ from the units that are used to measure temperature?
    10·1 answer
  • bond formed when atoms share one or more pairs of electrons, but atoms do not always share electrons equally
    8·1 answer
  • Which best explains why the pencil seems bent?
    10·1 answer
  • In concept simulation 10.2 you can explore the concepts that are important in this problem. astronauts on a distant planet set u
    14·1 answer
  • Can you please explain me how to do integration in physics in a easy way?
    8·1 answer
  • According to Newton's third law of motion, if this snowy owl wants to increase its altitude, what must it do?
    5·2 answers
  • 3. Two Metra trains approach each other on separate but parallel tracks. Train A has a speed of 90 km/ hr, train B has a speed o
    10·1 answer
  • If your mass is 60 kg on earth, what would your mass be on the moon?
    14·1 answer
  • While _[blank]_ science deals with knowledge discovery, _[blank]_ science deals with knowledge use.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!