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Lelu [443]
2 years ago
15

A certain heat engine does 30.2 kJ of work and dissipates 9.14 kJ of waste heat in a cyclical process.

Physics
1 answer:
valina [46]2 years ago
4 0

Answer:

a) H_{in}=39.34 kJ

b) Efficiency=76.77%

Explanation:

a)

In order to solve this problem, we can use the following formula:

H_{in}=H_{out}+W

the problem provides us with all the necessary information so we can directly use the formula:

H_{in}=9.14kJ+30.2kJ

H_{in}=39.34 kJ

b) In order to find the efficiency, we can use the following formula:

Efficiency=\frac{W}{H_{in}}*100\%

so we get:

Efficiency=\frac{30.2kJ}{39.34kJ}*100\%

Efficiency=76.77%

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Schach [20]

Answer:

The second one

Explanation:

The second one is joining so it is the one which belongs to X, first one belongs to Z

9 0
3 years ago
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In this problem, you will answer several questions that will help you better understand the moment of inertia, its properties, a
scoundrel [369]

Answer:

a)  Total mass form, density and axis of rotation location are  True

b)   I = m r²

Explanation:

a) The moment of inertia is the inertia of the rotational movement is defined as

       I = ∫ r² dm

Where r is the distance from the pivot point and m the difference in body mass

In general, mass is expressed through density

        ρ = m / V

        dm = ρ dV

From these two equations we can see that the moment of inertia depends on mass, density and distance

Let's examine the statements, the moment of inertia depends on

- Linear speed       False

- Acceleration angular False

-  Total mass form True

-  density True

- axis of rotation location   True

b) we calculate the moment of inertia of a particle

For a particle the mass is at a point whereby the integral is immediate, where the moment of inertia is

          I = m r²

4 0
3 years ago
If its wavelength were doubled, its energy would be If its wavelength were doubled, its energy would be 4E. 2E. 12E. 14E.
ANEK [815]

The wavelength was doubled, and its energy will be increased by 4 times.

looking at the formula

energy E = MC^2

also, c = \lambda \times \nu

hence it is clear from above that energy is directly proportional to the square of the wavelength.

hence, The wavelength was doubled, and its energy will be increased by 4 times.

<h3>What is Wavelength?</h3>
  • The distance over which a periodic wave's shape repeats is known as the wavelength in physics.
  • It is a property of both traveling waves and standing waves as well as other spatial wave patterns. It is the distance between two successive corresponding locations of the same phase on the wave, such as two nearby crests, troughs, or zero crossings.
  • The spatial frequency is the reciprocal of the wavelength. The Greek letter lambda is frequently used to represent wavelength.
  • The term wavelength is occasionally used to describe modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids.

To learn more about wavelength with the given link

brainly.com/question/13533093

#SPJ4

5 0
1 year ago
What happens to the light rays when they hit the specimen?
pogonyaev

Answer:

C

Explanation:

Ray of light when hits any specimen or object. The light is partially reflected, partially reflected and partially absorbed. It is never completed reflected, refracted or absorbed. Hence, the correct answer would be c.

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2 years ago
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Hornblede the mineral which is made of more than one element is hornblende
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