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adell [148]
3 years ago
8

Please help on this one?

Physics
1 answer:
vlada-n [284]3 years ago
7 0

Answer:

idk

Explanation:

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After an incandescent lamp is turned on, the temperature of its filament rapidly increases from room temperature to its operatin
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Answer: (1) The resistance increases and the current decreases.

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When the temperature of the filament increases, the vibrational energy of the constituent atoms increases which leads to increase in inter-atomic collision. Thus, the resistance would increase. The increases in resistance would obstruct the flow of charges more leading to decrease in the value of the current.

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11 A motor is used to lift a load of 40N
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Answer:

The correct answer is option D

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A car has a mass of 1.00 × 103 kilograms, and it has an acceleration of 4.5 meters/second2. What is the net force on the car?
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ANSWER


C. F=4.5 \times10^3. newtons


EXPLANATION


According to Newton's second law,



F_{net}=ma, where



m=1.00\times 10^3kg is the mass measured in kilograms.


and


a=4.5ms^{2} is the acceleration in metres per second square.



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F=1.00\times10^3 \times 4.5.



We rearrange to get,


F=1.00\times4.5 \times10^3.


We multiply out the first two numbers and leave our answer in standard form to get,



F=4.5 \times10^3 N.



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The spectra of most galaxies show redshifts. this means that their spectral lines _________.
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