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Rzqust [24]
3 years ago
12

A capacitor is charged to a potential difference of 3 volt it delivers 30% store energy to lamp what is the final potential diff

erence across the capacitor
Physics
1 answer:
nexus9112 [7]3 years ago
4 0

Answer:

3.98V

Explanation:

Given

Pontential difference V as 3v

Energy delivered is 30%,

Recall that Enery E=1/2cv^2 from this E=V^2(since Current C is not provided we can assume a value 2)

So E=V^2

E=3^2=9

At full charge E=9,30%of 9,0.3*9=2.7 energy in capacitor is 9-2.7=6.3

But E=V^2

✓E=V

✓6.3=3.98V

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Answer:

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Explanation:

It is given that,

Initial velocity, u = 0

Final velocity, v = 6.5 km/s = 6500 m/s

Time taken, t = 60 s

Acceleration, a=\dfrac{v-u}{t}

a=\dfrac{v}{t}  

a=\dfrac{6500\ m/s}{60}  

a=108.33\ m/s^2

Since, g=9.8\ m/s^2

So, a=(11.05)g\ m/s^2

So, the angular acceleration of the missile is (11.05)g\ m/s^2. Hence, this is the required solution.

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3 years ago
A boy is playing with a ball of mass 72g attached to a string. He is moving it at constant speed in a horizontal circle of radiu
irina [24]

Answer:

Explanation:

radius of circle r = 0.9 m.

(a ) In a motion on circular path , work done is zero because force ( centripetal force ) acts perpendicular to displacement .

( b )

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Putting the values

60 = .072 x ω² x 0.9

ω² = 926

ω = 30.4 rad /s

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time taken = θ / ω

= 126.6 / 30.4

= 4.16 s .

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A baseball thrown from the outfield to home plate does not have which of the following types of energy while it's in the air? A.
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What are the strengths and limitations of the doppler and transit methods? What kind of planets are easiest to detect with each
Arturiano [62]

\huge\mathfrak\red{✔Answer:-}

Strength: able to detect planets in a wide range of orbits, as long as orbits aren't face on

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3 years ago
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Serga [27]

Answer:

The correct option is;

- 4x

Explanation:

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The inverse square law can be presented as follows;

I = \dfrac{S}{4\times \pi \times  r^2 }

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I = \dfrac{4\times S}{4\times \pi \times  (2\cdot r)^2 } = I = \dfrac{4\times S}{4\times 4\times \pi \times  r^2 } =  \dfrac{S}{4\times \pi \times  r^2 }

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