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valentina_108 [34]
3 years ago
15

An electric field around two charged objects is shown.

Physics
1 answer:
mamaluj [8]3 years ago
3 0

Answer: D

<u></u>

X: positive

Y: negative

Explanation:

It's either A or D and I chose A and got it wrong.

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D. The number of electrons
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Describe what happens to the system inside of a refrigerator or freezer in terms of heat transfer, work, and conservation of ene
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Answer: A. Work is done on the system and heat is transferred from the system for a net decrease in internal energy.

Explanation:

A refrigerator is a device which dispenses heat from the close system to a warmer area or in the surrounding. By dispensing the heat the internal temperature of the refrigerator drops. The system of refrigerator violates the second law of thermodynamics. As it performs the work to cool the region instead of heating the region. The work is done on the system and the internal energy decreases and the heat energy is liberated to the surrounding area. A refrigerator is an open system.

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2 years ago
Aldis is swinging a ball tied to the end of a string over his head. Suddenly, the string breaks and the ball flies away. Arrow b
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Answer:

Straight line in the direction of the tangential velocity the ball had at the moment the string broke

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Is Fahrenheit an SI unit?
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As an object slides across a rough horizontal
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When the object slides across the rough surface some of its potential energy will be lost to friction.

<h3>Conservation of mechanical energy</h3>

The law of conservation of mechanical energy states that the total mechanical energy of an isolated system is always constant.

M.A = P.E + K.E

When the object slides across the rough surface, some of the potential energy of the object will be converted into kinetic energy while the remaining potential energy will be converted into thermal energy due to frictional force of the rough surface.

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Learn more about conservation of energy here: brainly.com/question/166559

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