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
guajiro [1.7K]
3 years ago
15

A machine has an efficiency of 70%. How much work dose the machine do when 20,000 J of work is done on it ?

Physics
1 answer:
Murrr4er [49]3 years ago
3 0

Answer: The machine does 14.000 J

You might be interested in
You have covered a grounded metal surface with a layer of photoconductor. Working in the dark, you sprinkle negative charge onto
Keith_Richards [23]

Answer:

A. the left half becomes neutral while the right half remains negatively charged

Explanation:

This is because wherever light strikes the photoconductor, it transforms from an insulator into a conductor. The charge will then migrate through it and leaves its surface. By exposing the left half of the photoconductor to light, you allow its local charge to leave and it becomes neutral.

6 0
3 years ago
► List two reasons why fungi are classified in a different kingdom from plants.
faltersainse [42]
Fungi is a bacteria because it is dependent
5 0
3 years ago
A satellite is launched to orbit the Earth at an altitude of 3.25 107 m for use in the Global Positioning System (GPS). Take the
Korolek [52]

Answer:Orbital period =21.22hrs

Explanation:

given that

mass of earth M = 5.97 x 10^24 kg

radius of a satellite's orbit, R=  earth's radius + height of the satellite

6.38X 10^6 +  3.25 X10^7 m =3.89 X 10^7m

Speed of satellite, v= \sqrt GM/R

where G = 6.673 x 10-11 N m2/kg2

V= \sqrt (6.673x10^-11 x 5.97x10^ 24)/(3.89 X 10^ 7m)

V =10,241082.2

v= 3,200.2m/s

a) Orbital period

\sqrt GM/R = \frac{2\pi r}{T}

V= \frac{2\pi r}{T}

T= 2 \pi r/ V

= 2 X 3.142 X 3.89 X 10^7m/ 3,200.2m/s

=76,385.1 s

60 sec= 1min

60mins = 1hr

76,385.1s =hr

76,385.1/3600=21.22hrs

3 0
3 years ago
Shut the following devices is based on the property of thermal expansion
LUCKY_DIMON [66]

Answer:

whatttttttttttssssssssss

8 0
3 years ago
How many bonds can antimony form?
bija089 [108]

Answer:

An antimony can form 3 bonds

Let me know if this helps

Thanks!

:)

Explanation:

4 0
2 years ago
Other questions:
  • Physicists talk about many forms of energy. One of the most common forms is force itself.
    15·1 answer
  • The difference between a nuclear weapon detonation and a conventional explosion is __________.
    8·1 answer
  • ________ reaction time involves selecting a specific and correct response from several choices when presented with several diffe
    14·2 answers
  • What gives an atom its charge?
    14·2 answers
  • A hot plume of mantle material, which may extend to the core-mantle boundary, produces a volcanic region a few hundred kilometer
    15·2 answers
  • Intermolecular forces hold together which of the following?
    7·2 answers
  • A 2.74 g coin, which has zero potential energy at the surface, is dropped into a 12.2 m well. After the coin comes to a stop in
    9·1 answer
  • A cosmic ray muon with mass mμ = 1.88 ✕ 10−28 kg impacting the Earth's atmosphere slows down in proportion to the amount of matt
    13·1 answer
  • Two vectors have magnitudes 3 and 4 . how are the directions of the two vectors related if: a/the sum has magnitude 7.0 ​
    9·1 answer
  • A skateboarder is traveling at a velocity of 8 m/s. She slows down and comes to a stop in 4 seconds. Calculate the skater’s acce
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!