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kow [346]
3 years ago
14

Number of electrons in Na

Physics
2 answers:
sukhopar [10]3 years ago
7 0
There are 11 electrons
Naddik [55]3 years ago
3 0

Answer:

11

Explanation:

Because 11 is its atomic number

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With a frequency of 500 hz, what is the period of a wave
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<span>500 hz means 500 times in a second therefore its 2.</span>
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We cannot see a new moon in our sky because ________. We cannot see a new moon in our sky because ________. a new moon is quite
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a new moon is quite near the Sun in the sky

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Workin
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8 0
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Help? I don't know how to do this.
aliya0001 [1]

Use the definition of acceleration:

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5 0
3 years ago
A capacitor in a single-loop RC circuit is charged to 85% of its final potential difference in 2.4 s. What is the time constant
atroni [7]

Answer:

The  time constant is  \tau  = 1.265 s

Explanation:

From the question we are told that

     the time take to charge is  t = 2.4 \  s

The mathematically representation for voltage potential of a capacitor at different time is

        V  =  V_o  - e^{-\frac{t}{\tau} }

Where  \tau  is the time constant  

           V_o is the potential of the capacitor when it is full

     So  the capacitor potential will be  100%  when it is full thus  V_o  =100%  =  1  

and from the  question we are told that the  at the given time the potential of the capacitor is 85% = 0.85 of its final potential so

      V  = 0.85

Hence

     0.85 =  1 -  e^{-\frac{2.4}{\tau } }

       - {\frac{2.4}{\tau } }  =  ln0.15

        \tau  = 1.265 s

     

7 0
3 years ago
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