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
kvv77 [185]
3 years ago
14

A certain heat engine takes in 300 J of energy from a hot source and then transfers 200 J of that energy to a colder object. Wha

t is the efficiency of the heat engine
Physics
1 answer:
Greeley [361]3 years ago
5 0

Answer:

The efficiency is 0.33, or 33%.

Explanation:

From the thermodynamics equations, we know that the formula for the efficiency of a heat engine is:

\eta=1-\frac{Q_2}{Q_1}

Where η is the efficiency of the engine, Q_1 is the heat energy taken from the hot source and Q_2 is the heat energy given to the cold object. So, plugging the given values in the formula, we obtain:

\eta=1-\frac{200J}{300J}=0.33

This means that the efficiency of the heat engine is 0.33, or 33% (The efficiency of an engine is dimensionless).

You might be interested in
An object weighing 49 N is pushed across a floor by a force of 12 N. What is the acceleration of the object?
NISA [10]

Answer:

Explanation:

Given parameters:

Weight of object  = 49N

Force applied = 12N

Unknown:

Acceleration of object  = ?

Solution:

The acceleration of the object is found by dividing the force by the weight;

 Acceleration  = \frac{12}{49}   = 0.25m/s²

3 0
2 years ago
During a demonstration of the gravitational force on falling objects to her class, Sarah drops an 11 lb. bowling ball from the t
leonid [27]

The instant it was dropped, the ball had zero speed.

After falling for 1 second, its speed was 9.8 m/s straight down (gravity).

Its AVERAGE speed for that 1 second was (1/2) (0 + 9.8) = 4.9 m/s.

Falling for 1 second at an average speed of 4.9 m/s, is covered <em>4.9 meters</em>.

ANYTHING you drop does that, if air resistance doesn't hold it back.

7 0
3 years ago
Read 2 more answers
Are the two expressions equvalent 7(8x+5) and 48x + 35
Evgesh-ka [11]
Yes they are equivalent because 7x5=35 and 8x x 5=48x
4 0
3 years ago
A tuna fish body is streamlined to reduce friction. Which describes the type of friction the fish must overcome?
STatiana [176]
The answer would be Fluid Friction
7 0
3 years ago
Read 2 more answers
Is there gravity in water?
Alexus [3.1K]

Answer: Yes.

Explanation:

There is gravity in water because How does the water go up in the cycle? the garavity with the wind pull it up.

3 0
2 years ago
Read 2 more answers
Other questions:
  • How is work defined in physics
    12·1 answer
  • At room temperature ice will melt while a brass lamp will stay as a solid. This must mean that the melting point of water is ___
    13·2 answers
  • For each type of wave compare the vibration of the medium to the direction of the wave
    14·1 answer
  • A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2. At an altitude of 0.50 km, the engine o
    8·1 answer
  • If the mass of a material is 50 grams and the volume of the material is 5 cm^3, what would the density of the material be?
    8·2 answers
  • Where is cloud data stored?
    5·2 answers
  • A student is driving through a mountainous region where the road is at some times flat, at some times inclined upward, and at so
    10·1 answer
  • When two forces are the same strength but act in opposite direction , they are called
    13·1 answer
  • Why is chlorine bonded by a single covalent bond, but Oxygen bonded by a double covalent bond?
    15·1 answer
  • True or False: There is no object that can travel faster than the speed of light.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!