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Katen [24]
3 years ago
15

A spherical shell of radius 1.70 m contains a single charged particle with q = 88.0 nC at its center. (a) What is the total elec

tric flux through the surface of the shell? N · m2/C (b) What is the total electric flux through any hemispherical portion of the shell's surface?
Physics
1 answer:
svetoff [14.1K]3 years ago
7 0

Answer:

Part a)

\phi' = 9943.5 Nm^2/C

Part b)

\phi' = 4971.75 Nm^2/C

Explanation:

Part a)

Total electric flux due to charge contained in a closed surface is given as

\phi = \frac{Q}{\epsilon_0}

now we have

Q = 88 nC

now from above equation total flux is given as

\phi = \frac{88 \times 10^{-9}}{8.85 \times 10^{-12}}

\phi = 9943.5 Nm^2/C

Part b)

Now we need to find the flux through the hemispherical surface

so we will have

\phi' = \frac{\phi}{2}

here we have

\phi' = \frac{9943.5}{2}

\phi' = 4971.75 Nm^2/C

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Answer:

The induced current will flow in a direction north of the plane of the paper

Explanation:

This is in compliance with faraday's right hand rule pictured below.

3 0
3 years ago
A fire truck emits an 880Hz siren. As the truck approaches an observer on the sidewalk, he perceives the pitch to be 950Hz. Appr
Ludmilka [50]

Answer:

The pitch that he hears after the truck passes and is moving away is 819.6 Hz.

Explanation:

The pitch that he hears after the truck passes and is moving away can be calculated using the following equation:    

f = f_{0}*\frac{v_{s} \pm v_{o}}{v_{s} \pm v_{f}}

Where:

f: is the perceived frequency

f_{0}: is the emitted frequency

v_{s}: is the speed of sound = 340 m/s

v_{o}: is the speed of the observer = 0 (he is not moving)

v_{f}: is the speed of the fire truck

First, we need to find the speed of the fire truck. When it approaches the observer we have:

f = f_{0}*\frac{v_{s} + v_{o}}{v_{s} - v_{f}}

950 Hz = 880 Hz*\frac{340 m/s}{340 m/s - v_{f}}

v_{f} = 340 m/s - \frac{880 Hz*340 m/s}{950 Hz}

v_{f} = 25.05 m/s

Hence, the speed of the fire truck is 25.05 m/s.

Now, we can calculate the pitch that the observer hears after the truck passes:

f = f_{0}*\frac{v_{s} - v_{o}}{v_{s} + v_{f}}

f = 880 Hz*\frac{340 m/s}{340 m/s + 25.05 m/s}

f = 819.6 Hz

Therefore, the pitch that he hears after the truck passes and is moving away is 819.6 Hz.

I hope it helps you!                                                          

7 0
3 years ago
The moon's gravity is one-sixth that of the earth. what is the period of a 2.00m long pendulum on the moon
erik [133]

Answer:

6.96 s

Explanation:

The period of a simple pendulum is given by:

T=2 \pi \sqrt{\frac{L}{g}}

where

L is the length of the pendulum and g the acceleration due to gravity.

In this problem, we have a pendulum with length L = 2.00 m, while the acceleration due to gravity is 1/6 that of the earth:

g' = \frac{g}{6}=\frac{9.8 m/s^2}{6}=1.63 m/s^2

So, the period of the pendulum on the moon is

T=2 \pi \sqrt{\frac{2.00 m}{1.63 m/s^2}}=6.96 s

3 0
3 years ago
which two tools below would be the most useful in testing how the mass of an object can affect the distance it moves after being
Mariulka [41]
It would be best to list the answer choice

3 0
4 years ago
The sum of potential and kinetic energies in the particles of a substance is called
olganol [36]

Internal energy.

Explanation:

In any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called Brownian motion). As a result, the particles have some kinetic energy (which is proportional to the temperature of the substance). Moreover, the particles interact with each other due to the presence of electrostatic intermolecular forces, and as a result, the particles also have some potential energy.

The sum of the kinetic energies and potential energies of the particles in a substance is called internal energy.

6 0
4 years ago
Read 2 more answers
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