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
inna [77]
4 years ago
8

A heat engine operates between 35 C and 330 C. If this engine extracts a total energy of 800 MJ from fuel, then how many MJ of e

nergy could be used as useful mechanical energy? Remember that e = 1 - T(low)/T(high), where T is in Kelvin (= Celsius + 273).
Physics
1 answer:
adelina 88 [10]4 years ago
7 0

Answer:

Machine used 392 MJ energy as mechanical energy.

Explanation:

Efficiency(e) is defined as the ratio of the work done by the machine to the energy provided to the machine.

e = \frac{Energy\ Used}{Energy\ Given}             .....(1)

The efficiency of the machine is also given by the relation :

e = 1 - \frac{T_{low} }{T_{high} }                 .....(2)

Here T(low) and T(high) denotes the temperature in kelvin.

According to the problem, T(low) = 35⁰ C = 35 + 273 = 308 K

                                            T(high) = 330⁰ C = 330 +273 = 603 K

Substitute the values of T(low) and T(high) in the equation (2).

e = 1 - \frac{308 }{603 }

e = 1 - 0.51

e = 0.49

According to the problem, Energy Given = 800 MJ

Substitute the value of efficiency(e) and Energy Given in the equation (1).

0.49 = \frac{Energy\  Used}{800 MJ}

Energy used = 0.49 x 800 MJ = 392 MJ

You might be interested in
In nuclear fission and fusion the mass defect is
riadik2000 [5.3K]

Option C

In nuclear fission and fusion the mass defect is the mass lost during the reaction that is converted into energy

<u>Explanation:</u>

Mass defect is the contrast within the estimated mass of the released system and the empirically estimated mass of the nucleus. The nuclear binding energy is acknowledged as mass, and that mass enhances "missing".

This missing mass is described as a mass defect, which is nuclear energy, also acknowledged as the mass discharged from the reaction as any trajectories. The mass defect of a nucleus depicts the mass of the energy adhesive of the nucleus and is the variation amidst the mass of a nucleus and the entirety of the masses of the nucleons of which it is comprised.

6 0
4 years ago
Read 2 more answers
what is the capacitance of two square parallel plates 6.7 cm on a side that are separated by 1.8 mm of paraffin? the dielectric
almond37 [142]

The capacitance of two square parallel plates will be 1.777 farads.

<h3>What is the capacitance of two parallel plates?</h3>

The body's capacity to hold electric charge is constrained by capacitance. There is a capacitance for each capacitor. Two metallic sheets of area A, spaced by d, make up the standard parallel-plate capacitor.

The parallel plate capacitor formula is given by:

C = ε Ad

Two square parallel plates 6.7 cm on a side are separated by 1.8 mm of paraffin. The dielectric constant of paraffin is 2.2. Then the capacitance of two square parallel plates will be given as,

C = ε Ad

C = 2.2 x 0.67 x 0.67 x 1.8

C = 1.777 farad

Two parallel square plates will have a capacitance of 1.777 farads.

More about the capacitance of two parallel plates link is given below.

brainly.com/question/12733413

#SPJ4

7 0
2 years ago
Which of the following would be an example of basic research
abruzzese [7]
Basic research, also called pure research or fundamental research, is scientific research aimed to improve scientific theories for improved understanding or prediction of natural or other phenomena.

(source: wikipedia)
5 0
3 years ago
Read 2 more answers
Which is the best estimate for the mass of a typical lineman on a high school football team
fgiga [73]

We have that the best estimate for the mass of a typical lineman on a high school football team is

100,000 g=100kg

From the options

1. 100,000 g

2. 100,000 kg

3. 100,000 mg

Generally

A Typical lineman cannot be as small as

100000mg=0.1kg=100g

A Typical linesman cannot be as massive as

100,000kg as that is unrealistic

With the Average Mass of A Typical linesman can be

100,000 g=100kg

In conclusion

The best estimate for the mass of a typical lineman on a high school football team is

100,000 g=100kg

For more information on this visit

brainly.com/question/10069252

7 0
3 years ago
What is a phenomenon in your own words?
Nadusha1986 [10]

Answer: 1 : an observable fact or event. 2a : an object or aspect known through the senses rather than by thought or intuition. b : a fact or event of scientific interest susceptible of scientific description and explanation. More from Merriam-Webster on phenomenon.

3 0
3 years ago
Read 2 more answers
Other questions:
  • An unwary football player collides with a padded goalpost while running at a velocity of 7.50 m/s and comes to a full stop after
    5·1 answer
  • Density of salty water as compared to the density of pure water is
    11·1 answer
  • 50 pounds is equal to 22,700 grams. How many pounds does this backpack full of gold weigh? Would you be able to carry out that b
    8·1 answer
  • For any object, the greater the force that's applied to it, the greater its ____ will be.
    11·2 answers
  • A proton is moving toward a stationary charged particle. Which statement correctly describes an energy change that could occur a
    13·1 answer
  • What is primary purpose of Pathfit?​
    9·1 answer
  • Which nucleus completes the following equation? ​
    15·1 answer
  • What is the symbol for carbonate ?
    8·1 answer
  • Experiment to show that light travels in a straight line​
    9·1 answer
  • What are northern lights? a lights on mars b lights on the sun c lights on venus
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!