In zoes egg experiment which two forces are balanced to keep it from hitting the pan
1 answer:
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Answer:
The second option.
When the current flows up the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
Explanation:
The first figure that I copy here with is the figure corresponding to this question.
The thumb is pointing upward.
The rule is that the thumb aims to the direction of the flow of current and the other fingers give the field lines.
The second figure that I attach is a free image from internet and it shows the direction of both the current and the fiedl lines.
So, the conclusion is that the current goes upward the wire and the field lines go out of the paper (screen) for the points to the left of the wire and in on the right side of the wire.
The second option.
When the current flows up the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
Explanation:
The first figure that I copy here with is the figure corresponding to this question.
The thumb is pointing upward.
The rule is that the thumb aims to the direction of the flow of current and the other fingers give the field lines.
The second figure that I attach is a free image from internet and it shows the direction of both the current and the fiedl lines.
So, the conclusion is that the current goes upward the wire and the field lines go out of the paper (screen) for the points to the left of the wire and in on the right side of the wire.
1) 2.5 wavelengths
2) 0.208 m
3) 1731 Hz
Explanation:
1)
Standing waves are waves that do not propagate, but instead the particles of the medium just oscillate around a fixed position. Examples of standing waves are the waves produced on a string with fixed ends.
The points of a standing wave in which the amplitude of the oscillation is always zero are called nodes.
The two fixed ends of the string are two nodes. In this problem, we have a total of 6 nodes along the string: this means that there are 4 additional nodes apart from the two ends of the string.
Therefore, this also means that the string oscillate in 5 different segments.
One wavelength is equal to 2 segments of the oscillation: therefore, since here there are 5 segments, this means that the number of wavelengths that we have in this string is
2)
The wavelength of a wave is the distance between two consecutive crests (or throughs) of the wave.
The wavelength of a standing wave can be also measured as the distance between the nth-node and the (n+2)-th node: so, basically, the wavelength in a standing wave is twice the distance between two nodes:
where
is the wavelength
d is the distance between two nodes
Here the length of the string is
L = 0.520 m
And since it oscillates in 5 segments, the distance between two nodes is
And therefore, the wavelength is
3)
The frequency of a wave is the number of complete oscillations of the wave per second.
The frequency of a wave is related to its speed and wavelength by the wave equation:
where
v is the speed
f is the frequency
is the wavelength
In this problem:
v = 360 m/s is the speed of the wave
is the wavelength
Therefore, the frequency is