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katovenus [111]
3 years ago
7

(a) What is the current involved when a truck battery sets in motion 720 C of charge in 4.00 s while starting an engine? (b) How

long does it take 1.00 C of charge to flow through a calculator if a 0.300 mA current is flowing?
Physics
1 answer:
OLEGan [10]3 years ago
8 0

Answer:

(a) Current flowing through truck battery is 180 A

(b) Time taken in calculator is 333.33 s

Explanation:

(a) Given:

The charge on the truck battery,q = 720 C

Time, t = 4.00 s

Consider I be the current flowing through truck battery.

The relation between current, charge and time is:

I = q/t

Substitute the suitable values in the above equation.

I=\frac{720}{4}

I = 180 A

(b) Given:

The charge on the calculator,q = 7.00 C

The current flowing through calculator, I = 0.3 mA = 0.3 x 10⁻³ A

Consider t be the time.

The relation between current, charge and time is:

t = q/I

Substitute the suitable values in the above equation.

t=\frac{1}{0.3\times10^{-3} }

I = 333.33 s

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Answer:

A. 16.67 m/s

Explanation:

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Time is in seconds.

In this question, Steve throws a football 50 meters in 3 seconds. The average speed can be calculated this:

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Answer:

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Explanation:

From the question we are told that

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   The  charge on the electron/proton  is  e =  1.6*10^{-19} \  C

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Generally for the electron to be held up by the force gravity

   Then    

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         \frac{9*10^9 *  (1.60 *10^{-19})^2  }{r^2 }  =     9.11 *10^{-31 }  *  9.81

         r =  \sqrt{25.78}

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3 years ago
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The accurate answer is
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rodikova [14]

Answer:

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Explanation:

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