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kirill115 [55]
3 years ago
7

Ill give brainly if you answer in 5 minutes

Physics
1 answer:
elena-s [515]3 years ago
5 0

Answer:

20k hz

Explanation:

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A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an internal resistance of 3.90 MΩ. A
iren2701 [21]

Explanation:

(a)  Formula to calculate the capacitance is as follows.

           V_{c} = V_{o} (e^(\frac{-t}{RC}))

Now, putting the given values into the above formula as follows.

          V_{c} = V_{o} (e^(\frac{-t}{RC}))

          3.5 V = 12 V (e^(\frac{-3.50 sec}{3.90 \times C}))

    e^(\frac{-3.50 sec}{3.90 \times C}) = 0.291

or,       \frac{-3.50 sec}{3.90 \times C} = ln (0.291)

      \frac{-3.50 sec}{3.90 \times C} = -1.23

              C = 0.729 F

Hence, the value of capacitance is 0.729 F.

(b)   Formula to calculate the constant of circuit is as follows.

               T = R \times C

                  = 3.1 \times 0.729

                  = 2.259 sec

Therefore, the time constant of the circuit is 2.259 sec.

5 0
4 years ago
You go outside on a bright, warm day, How can you tell that you are absorbing radiant energy from the sun?
iVinArrow [24]

Answer:

you start sweating and it would get hot

7 0
3 years ago
You place a small air cart on a 4.00 m air track and set it into motion with a speed of 0.75 m/s. Due to very good elastic bumpe
san4es73 [151]

Answer:

6 seconds

0.167 Hz

Explanation:

Distance = 4 m

Velocity = 0.75 m/s

Period is given by

T=2\times Distance\times Velocity\\\Rightarrow T=2\times 4\times 0.75\\\Rightarrow T=6\ s

The period of the motion is 3 seconds

Frequency is given by

f=\frac{1}{T}\\\Rightarrow f=\frac{1}{6}\\\Rightarrow f=0.167\ Hz

The frequency of the motion is 0.33 Hz

3 0
3 years ago
Which part of the wave is changed when there is interference?
Ne4ueva [31]
The amplitude is changed.
7 0
4 years ago
Read 2 more answers
When the direction of an object changes what happens to its velocity?
liberstina [14]

Direction of motion is one part of a complete description of velocity.

So if the direction of motion changes, that's a <em>change of velocity</em>, even if the speed didn't change.

The change of direction is called "an acceleration", even if the speed didn't change.

6 0
4 years ago
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