3 years ago

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