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maxonik [38]
3 years ago
5

The low-frequency speaker of a stereo set has a surface area of 0.06 m2 and produces 2.03 W of acoustical power. What is the int

ensity at the speaker (in W/m2)
Physics
1 answer:
zimovet [89]3 years ago
8 0

Answer:

33.83W/m²

Explanation:

The intensity of the speake at the surface is

I = P/A

I = 2.03W / 0.06m²

I = 33.83W/m²

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A parallel-plate capacitor is connected to a battery. After it becomes charged, the capacitor is disconnected from the battery a
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Answer:

The potential difference between the plates increases

Explanation:

As we know that the capacitance of the capacitor is given by:

q = CV         (1)

where

q = charge

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C = \frac{\epsilon_{o}A}{D}           (2)

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D = Separation distance between the plates

Now, from eqn (1) and (2):

V = \frac{qD}{A\epsilon_{o}}

Now, from the above eqn  we can say that:

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Therefore, after disconnecting, if the separation between the plates is increased the potential difference across it also increases.

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Answer:

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