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2 years ago

A car's engine runs on gasoline. A scientist describes the engine to be about 12% efficient. What does this mean?

1 answer:

5 0

Efficiency is the estimation of output power by any machine. A 12% efficient engine has an output provided by the input energy of the engine. Thus, option D is correct.

<h3>What is efficiency?</h3>

Efficiency is defined as the energy given by the machine, engine, or any system by utilizing the input power or energy. It is given as,

η = Output ÷ Input × 100%

It is used to know the ability of the machine to transfer the input energy to an external amount of work. The engine with 12% efficiency is said to have produced energy by utilizing the provided 12% input.

Therefore, option D. the 12% of input power is used by the engine to produce the energy.

Learn more about efficiency here:

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the process of separating a liquid/solid mixture by slowly pouring the liquid component into a new vessel as the solid settles t

olga55 [171]

The process involving separation of liquid/solid mixture as regards this question is Decantation.

Decantation can be regarded as one of the process used in separation of liquid from solid as well as other immiscible (non-mixing) liquids through the removal of the liquid layer that is present at the top from the layer of solid/liquid which present at the below.

In the process, the liquid will be poured slowly into another vessel as the pouring continues, then the solid will settle in the original vessel.

This process can be done through tilting the mixture after the the top layer have been poured out.

<em>Therefore, decantation is one of the separation technique.</em>

Learn more at: brainly.com/question/16937734?referrer=searchResults

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3 years ago

You have been given a piece of evidence indicating that plant and animal life is scarce in this environment. Identify this envir

ICE Princess25 [194]

Answer:

This is a desert because there is little precipitation for plant and animal life to thrive.

Explanation:

Tundra is harsh environment because of its cold temperature, so it's definitely not too hot. Swamp temperature should be not too cold or hot. The rainforest should have abundant plant and animal life.

Desert has very low precipitation and low moisture so that not much water can be found around. Water is vital for any plant or animal. Water also helps regulate temperature and make the fluctuation in the environment extreme. The temperature around the desert can be really high at daylight and low at night.

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3 years ago

Unlabeled atoms joined to carbon atoms, which are not directly part of a ring structure, are assumed to be oxygen atoms.

N76 [4]

The statement above is FALSE.
Unlabeled atom joined to carbon atoms which are not directly part of a ring structure are assumed to be CARBON ATOMS. In a ring structure, an unlabeled atom at the angle where two lines joined together is always assumed to be a carbon atom<span />

3 0

4 years ago

In the Penny Lab that we ran, what is the independent variable? Question 1 options: the soap the number of water drops the penny

motikmotik

Answer:

I'd say it's the number of water drops.

Explanation:

The number of water drops is what you're controlling or purposely controlling and that answer choice makes the most sense out of the other answer choices. So I'd say it's "The Number of Water Drops."

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3 years ago

Which type of change is represented?

pentagon [3]

The correct answer is A. The image shows a nuclear fission. This takes place in any of the heavy nuclei after capture of a neutron. This is the opposite of nuclear fusion. In this case, nuclei are broken down into two.

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4 years ago