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Jobisdone [24]
3 years ago
8

When objects are forced to vibrate ( like when dropped onto a hard surface), they will do so at their

Physics
1 answer:
Marat540 [252]3 years ago
3 0

They'll vibrate at their characteristic resonant frequency. That depends on the material the object is made of and its shape.


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What kind of surface is suitable for infared radiation
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Answer:

Different surfaces

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When a condenser discharges electricity, the instantaneous rate of change of the voltage is proportional to the voltage in the c
e-lub [12.9K]

Answer:

460.52 s

Explanation:

Since the instantaneous rate of change of the voltage is proportional to the voltage in the condenser, we have that

dV/dt ∝ V

dV/dt = kV

separating the variables, we have

dV/V = kdt

integrating both sides, we have

∫dV/V = ∫kdt

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-0.01V = kV

k = -0.01

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Given that the voltage decreases by 90 %, we have that the remaining voltage (100 % - 90%)V₀ = 10%V₀ = 0.1V₀

So, V = 0.1V₀

Thus

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to find the time, t it takes the voltage to decrease by 90%, we taking natural logarithm of both sides, we have

㏑(0.01) = -0.01t

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t = -4.6052/-0.01

t = 460.52 s

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