If a system requires 150 J of input work and produces 123 J of output work, what's its efficiency?

Answers

Answer 1
Answer: The efficiency of work is a dimensionless value, and is equivalent to the ratio of the actual work output to the theoretical work requirement. This can be calculated using the equation:

Efficiency = (actual work) / (work requirement) = 123/150 = 0.82

The higher the efficiency, the better performance is given by the system. In reality, efficiency is always lower than 1 which is the ideal value.


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which of the following products of the dark reactions is critical for progression to cellular respiration

Answers

The light-independent (or dark reaction) produces sugar-phosphate molecules, which are used as an important reactant in cellular respiration. Hope this helps!

What advantage (if any) is there to breeding organisms from closely related species? Explain.

Answers

Answer:

We can take advantage of this to selectively breed animals or plants, choosing parents with particular characteristics to produce offspring that have those characteristics.

Explanation:

For example, if we breed taller animals together and exclude shorter animals, the offspring should inherit “tall” gene variants that make them tall.

Answer: it could create new species in that same genius like how the pug was selectively bread.

Explanation:

Which one of the following does not contain calories?A. Carbohydrate
B. Alcohol
C. Water
D. Protein

Answers

I think so the right ans is water

The above picture represents the different stages a cell goes through in its "lifetime." Specific genes within the DNA, called inhibitors, stop the cell cycle in G1 phase. This process helps to keep the DNA unaltered and the cells dividing at the correct rate. If cells continue through the cell cycle, uncontrolled, _________ may likely develop.

Answers

The answer is a tumor.  

Tumors are characterized by cells that have a mutation in their DNA that causes them to reproduce unregulated hence proliferate and do not form true tissues.  Inhibitors, called tumor suppressors, act like a ‘brake’ in the cell cycle. Cyclins, on the other hand, are the ‘gas pedal’ for the cycle. The right balance ensures that cell cycle is well regulated.   When the DNA is a cell is damaged, the tumor suppressors are rectruited to stop any further progress of the cell cycle and the cell undergoes apoptosis.


Answer:

tumor

Explanation:

i took the test

Which of the following best explains why deforestation increases the risk of floods in an area?a. Tree leaves catch and retain rain water.b. Trees block the free flow of water.c. Deforestation increases precipitation.d. Tree roots improve soil water retention.Please select the best answer from the choices provided

Answers

Answer: D) Tree roots improve soil water retention

There are many reasons which states that deforestation increases the risk of flood. First   , some water stay on the leaves and evaporates in to the atmosphere. Second, tree leaves reduce the impact of raindrops on the soil which causes less soil erosion.

Third, tree roots absorb water from the soil, which make the soil dry and it absorb more water rainwater. The roots of tree hold the soil in place and reduce the movement of sediment which reduce the capacity of river to break its banking. Thus, reducing the chances of flood.

The answer is D your welcome

Which of the following organisms is a heterotroph? A. mushroom B. alga C. wheat D. sunflower

Answers

Out of the choices given, the organism that is a heterotroph is a mushroom. The correct answer is A. 
the answer is a.mushroom