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Amiraneli [1.4K]
4 years ago
13

In a motor, electrical current enters through the brushes. a. True b. False

Physics
1 answer:
Alinara [238K]4 years ago
8 0
True, in a motor, electrical current enters through the brushes.
<span>Brush conducts the current from the stationary wires to the moving parts of the motor. 
Some examples of this are:
Generator.
</span>
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Air that enters the pleural space during inspiration but is unable to exit during expiration creates a condition called a. open
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The correct answer is d. tension pneumothorax.

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3 years ago
How would the terminal velocity of a piece of tissue paper compare to the terminal velocity of a rock?
matrenka [14]

Answer: Rock require larger drag force and to achieve it rock need to move at a very high terminal velocity.  

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Case 1: Terminal velocity of a piece of tissue paper.

The weight of tissue paper is very less and it experiences an air resistance while falling downward under the effect of gravity.

Downward gravitational force, F = mg

Upward air resistance or friction or drag force will be f_{1}

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Case 2: Rock is very heavy and require larger air resistance to balance the weight of rock relative to the tissue paper case.

Downward force on rock, F = Mg

Drag force = f_{2}

Rock will attain terminal velocity when Mg = f_{2}

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5 0
3 years ago
How are balanced and unbalanced forces related to motion?
Aliun [14]

Answer:

Balanced forces do not result in any change in motion. forces: forces applied to an object in opposite directions that are not equal in size. Unbalanced forces result in a change in motion.

Explanation:

4 0
3 years ago
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