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zimovet [89]
3 years ago
9

Which experiment showed that the atom has a dense positive center?

Physics
1 answer:
bearhunter [10]3 years ago
8 0
A.the gold foil experiment.
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A stone is thrown vertically up. What kind of energy did the stone have initially? What happens to this energy as the stone asce
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Answer:

kinetic energy at first

Explanation:

kinetic turns to potential as it gains height

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If chilled coke and hot tea are kept together tea cools down but coke gets warm .why?​
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Gas pressure in a closed system is caused by___. A. Heat given off by constant collisions.. B. Compression of the gas. C. Result
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2 years ago
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A battery with an emf of 12.0 V shows a terminal voltage of 11.4Vwhen operating in a circuit with two lightbulbs, each rated at
FinnZ [79.3K]

Answer:

0.95 A

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P = Power of bulb = 4 W

V = Voltage = 12 V

Power is given by

P=\dfrac{V^2}{R}\\\Rightarrow R=\dfrac{V^2}{P}\\\Rightarrow R=\dfrac{12^2}{4}\\\Rightarrow R=36\ \Omega

The connections are in Parallel

Equivalent resistance of these two bulb

\dfrac{36}{2}=18\ \Omega

Current from the source

I=\dfrac{11.4}{18}=0.63\ A

The voltage drop is

12-11.4=0.6\ V

Voltage drop is given by

\Delta V=R_iI\\\Rightarrow R_i=\dfrac{\Delta V}{I}\\\Rightarrow R_i=\dfrac{0.6}{0.63}\\\Rightarrow R_i=0.952380952381\ A

The internal resistance is 0.95 A

3 0
3 years ago
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