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3 years ago

A system uses 2,380 J of energy to do work as 12,900 J of heat are added to the system.

1 answer:

4 0

The <span>change in internal energy of the system is 10520 J

</span>From the first law of thermodynamics, the change in internal energy is equal to work done by the system subtracted from the heat added to the system.

i.e.ΔU = Q - W
Now, as per question, <span>A system uses 2,380 J of energy to do work as 12,900 J of heat are added to the system.

Thus, </span>ΔU = 12900 - 2380 = 10,520 J

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2 years ago

Suppose that you have a 680 Ω, a 720 Ω and a 1.20 kΩ resistor. (a) What is the maximum resistance you can obtain by combining th

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Explanation:

As the given data is as follows.

$R_{1} = 680 \ohm$ ohm $\ohm$ , $R_{2} = 720 \ohm$ ohm,

$R_{3} = 1.2 k\ohm$ = 1200 $\ohm$ (as 1 k ohm = 1000 m)

(a) We will calculate the maximum resistance by combining the given resistances as follows.

Max. Resistance = $R_{1} + R_{2} + R_{3}$

= $(680 + 720 + 1200) \ohm$ ohm

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or, = 2.6 $k\ohm$ ohm

Therefore, the maximum resistance you can obtain by combining these is 2.6 $k\ohm$ ohm.

(b) Now, the minimum resistance is calculated as follows.

Min. Resistance = $\frac{1}{R_{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}}$

= $\frac{1}{680} + \frac{1}{720} + \frac{1}{1200}$

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Hence, we can conclude that minimum resistance you can obtain by combining these is $3.683 \times 10^{-3}$ ohm.

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2 years ago

Speakers A and B are vibrating in phase. They are directly facing each other, are 8.2 m apart, and are each playing a 78.0 Hz to

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Explanation:

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= $\frac{343}{78}$ =4.397 m

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x=4.1m

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$\left ( 8.2-x\right )-x=4.397$

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2 years ago

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andrey2020 [161]

Answer:

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