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vredina [299]
3 years ago
7

What is the current in the circuit at the instant the capacitor begins to charge (the instant the switch is first closed)?

Physics
1 answer:
daser333 [38]3 years ago
8 0

Complete  Question

The  complete question is shown on the first uploaded image

Answer:

The current is  I  =  4.2 \ A

Explanation:

From the question we are told that

    The  voltage of battery is  V  = 25 V

     The  capacitance of capacitor is  C =  15 \mu F

      The resistance of the resistor is  R =  6 \Omega

Generally the current at the instant the capacitor starts charging is  

             I  =  \frac{V}{R}

substituting values

           I  =  \frac{25}{6}

         I  =  4.2 \ A

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A sonar emits a sound signal of frequency 40000Hz, towards the bottom of the sea.
kap26 [50]

Answer:

0.000025s

Explanation:

Period it’s. : T(s)= 1/f(Hz)=1/40000Hz=0.000025s

8 0
2 years ago
Find the speed of a rock being thrown 20.5 meters (m) to the left in 4.0s.
erik [133]

Answer:

5.125

Explanation:

formula for speed is distance/time distance measured in metres

8 0
2 years ago
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If a sample emits 2000 counts per second when the detector is 1 meter from the sample, how many counts per second would be obser
Alona [7]

Answer:

<h2><em>6000 counts per second</em></h2>

Explanation:

If a sample emits 2000 counts per second when the detector is 1 meter from the sample, then;

2000 counts per second = 1 meter ... 1

In order to know the number of counts per second that would be observed when the detector is 3 meters from the sample, we will have;

x count per second = 3 meter ... 2

Solving the two expressions simultaneously for x we will have;

2000 counts per second = 1 meter

x counts per second = 3 meter

Cross multiply to get x

2000 * 3 = 1* x

6000 = x

<em></em>

<em>This shows that 6000 counts per second would be observed when the detector is 3 meters from the sample</em>

5 0
3 years ago
Answer?????????????????
oksano4ka [1.4K]

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4 0
3 years ago
A bee wants to fly to a flower located due North of the hive on a windy day. The wind blows from East to West at speed 6.68 m/s.
Aleonysh [2.5K]

Answer:  53.31\° East of North

Explanation:

We have the following data:

Speed of the wind from East to West: 6.68 m/s

Speed of the bee relative to the air:  8.33 m/s

If we graph these speeds (which in fact are velocities because are vectors) in a vector diagram, we will have a right triangle in which the airspeed of the bee (its speed relative to te air) is the hypotense and the two sides of the triangle will be the <u>Speed of the wind from East to West</u> (in the horintal part) and the <u>speed due North relative to the ground</u> (in the vertical part).

Now, we need to find the direction the bee should fly directly to the flower (due North):

sin \theta=\frac{Windspeed-from-East-to-West}{Speed-bee-relative-to-air}

sin \theta=\frac{6.68 m/s}{8.33 m/s}

Clearing \theta:

\theta=sin^{-1} (\frac{6.68 m/s}{8.33 m/s})

\theta=53.31\°

6 0
3 years ago
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