If you have a heat engine with a hot reservoir of 515°C and a cold reservoir of 190°C, what is the thermal efficiency of the system?

Answers

Answer 1

Answer:

The equation for the thermal efficiency of a system is given by n = Tc/Thx100 where n is the thermal efficiency, Tc is the temperature of the cold reservoir and Th is the temperature of the hot reservoir. Dividing 190 by 515 gives us an efficiency of 36.9%.

Answer 2

Answer:

Answer: A.

63.1%

Explanation: edmentum

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What is produced from the third stage of cellular respiration, the electron transport chain? A. NADH and water B. Water and ATP C. Pyruvate and ATP D. Carbon dioxide and NADH

Answers

The answer is B. Water and ATP.

The main function of electron transport chain (ETC) is a production of ATP. It takes electrons freed in the previous stages of cellular respiration. It is actually a series of oxidation-reduction reactions in which the oxygen is the final acceptor of electrons. As the result, water and ATP are produced.

Answer:

B- water and ATP

Explanation:

I took the test and it was correct

Which statement is true about macromolecules?a. simple sugars are made of polysaccharides.
b. glycerol is made of fatty acids.
proteins are made of amino acids.
nucleotides are made of nucleic acids.

Answers

proteins are made of amino acids is the true statement.

Final answer:

The correct statement about macromolecules is 'Proteins are made of amino acids'. It should be noted that in other options, the statements have a part reversed and therefore they are incorrect.

Explanation:

The correct statement about macromolecules is 'Proteins are made of amino acids'. Macromolecules are large, complex molecules that have a high molecular weight. They are mostly built from single subunits, or building blocks, called monomers. In this context, amino acids are the monomers that make up proteins which are a type of macromolecule.

To provide some clarity on the incorrect options: `Simple sugars are not made of polysaccharides` but the other way around. Polysaccharides are complex carbohydrates that are made up of simple sugar monomers. Similarly, `glycerol is not made of fatty acids`, rather, it combines with fatty acids to form lipids. Lastly, `nucleotides are not made of nucleic acids`, but nucleic acids are made of nucleotides. So, it's important to understand the relationships between these biochemistry terms to correctly understand the nature of macromolecules.

Learn more about Macromolecules here:

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How many variables should you have in a control experiment?

Answers

It depends on the case, but usually two variables should be in a controlled experiment.

you should do three variables so you can note the difference

Use an analogy to describe the role of ATP in living organisms

Answers

ATM is shortened adenosine triphosphate. This is required by all living cells as this serves as the continual supply of energy which keeps the organism alive. In an analogy, we may consider ATP as money in which one needs in order to survive. When it is spent, it needs to be replenished.

The most commonly used analogy in the description of the function of ATP is that or currency. Just as we must utilize currency when trying to buy something or perform certain tasks, cells must utilize the ATP molecule by breaking it down, similar to how we must hand over our currency. Then, if the cell wants regenerate ATP, it must perform a number of chemical reactions, just as we earn our currency back.

What is the largest object in our solar system? A. Saturn
B. An asteroid
C. Jupiter
D. The Sun

Answers

It is D) The sun.

The sun is the biggest/largest star in our solar system. Its mass is 1.989 kg. Just some amounts bigger than Jupiter.

The largest object in our solar system is the Sun (D).

Population distribution in Europe and Russia is most impacted byA government restrictions
B. cultural differences
C. natural resources
D. climate
Please select the best answer from the choices provided
OA
OB
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0
Mark this and return
Save and Exit

Answers

Answer:

i think right answer is climate.

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All cells are surrounded by a semipermeable membrane, which regulates the passage of materials in and out of the cell. The principle structure of this membrane isa. two layers of protein with a single layer of lipids in between. b. a thick wall of cellulose with a thin lipid coating on the inside. c. two layers of lipids with proteins associated with the lipids. d. two layers of lipids with a polysaccharide layer in between.

Why do cells need a constant supply of energy