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
pashok25 [27]
3 years ago
13

What is perfect machine?Why is this machine not possible in the real life?​

Physics
1 answer:
andrezito [222]3 years ago
5 0

Explanation:

The machine whose efficiency is 100% is known as perfect machine .This machine is not possible in real life because every machine is affected by the overcoming friction due to which is efficiency become less than hundred percent .

You might be interested in
Dark cooler areas on the sun's surface are called what? (Prominences, solar flares, coronas, or sunspot)
Serhud [2]
Darker, cooler areas on the sun's surface are called sunspots.
Hope that helped =)
7 0
4 years ago
Read 2 more answers
How does an airplane engine work?
vivado [14]

Answer:

Explanation:

Un motor aeronáutico o motor de aviación es aquel que se utiliza para la propulsión de aeronaves mediante la generación de una fuerza de arrastre.

Existen distintos tipos de motores de aviación, aunque se dividen en dos clases básicas: motores recíprocos —o de pistón— y de turbina de gas. Recientemente y gracias al desarrollo de la NASA y otras entidades, se ha comenzado también la producción de motores eléctricos para aeronaves que funcionen con energía solar fotovoltaica.

eso depende de el motor que cada avion tenga

7 0
3 years ago
It takes Serina 0.68 hours to drive to school. Her route is 34 km long. What is Serina's average speed on her drive to school?
shusha [124]

Speed = distance / time

Speed = 34 km / 0.68 hrs

Speed = 50 km/hr

3 0
3 years ago
A bicyclist moves along a straight line with an initial velocity vo and slows downs. Which of the following the best describes t
xeze [42]

????????????????????

3 0
3 years ago
Which of the following are possible causes of mass extinctions that scientists have identified
Alecsey [184]

Answer:

over harvesting, pollution, introduction of invasive species such as new predators and food competitors

Explanation:

The main cause of mass extinction is Humans cause extinction of a species through overharvesting. The second main  cause is pollution ., introduction of invasive species such as new predators and food competitors, habitat destruction, overhunting and other influences. Another very important cause of mass extinction is the unsustainable human population growth.

The five mass extinction events are

Ordovician Mass Extinction

Devonian Mass Extinction

 Permian Mass Extinction

Triassic -Jurassic Mass Extinction

and Cretaceous -Tertiary (or the K-T) Mass Extinction.

4 0
4 years ago
Other questions:
  • Two stars are 3.7 1011
    11·1 answer
  • The total thermal energy needed to raise the temperature of this ice cube to 0.0 °C and completely melt the ice cube is 5848 J
    12·1 answer
  • A gas had a initial volume of 168 cm at a temperature of 255 k and a pressure of 1.6 atm the pressure of the gas decreased to 1.
    12·1 answer
  • A transformer connected to a 120 V (rms) ac line is to supply 13,000 V (rms) for a neon sign. To reduce shock hazard, a fuse is
    13·2 answers
  • Define the apparent cubic expansivity of a liquid​
    13·1 answer
  • A ball is kicked at 30.0 m/s at an angle of 20.0°. Beneath the tilted columns calculate the vertical and horizontal components.
    12·1 answer
  • Chemical reactions occur due to sharing or transferring of blank. Please help ASAP!!!!
    7·2 answers
  • A 56 kg woman climbs the stairs to a height of 5 m. Determine: a) what mechanical work
    7·1 answer
  • How far does an athlete travel at 10Km/hr in Half hour?
    9·1 answer
  • A glider attached to one end of a string oscillates given by the displacement function x(t) = 0.030cos(4.00t) is the acceleratio
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!