A wave is 8 meters long and has a frequency of 3 Hz. Find speed
1 answer:
Answer:
The speed is 24
Explanation:
A wave is a disturbance that propagates through a certain medium or in a vacuum, with transport of energy but without transport of matter.
The wavelength is the minimum distance between two successive points of the wave that are in the same state of vibration. It is expressed in units of length (m).
Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).
The speed of propagation is the speed with which the wave propagates in the middle, that is, the magnitude that measures the speed at which the wave disturbance propagates along its displacement. Relate wavelength (λ) and frequency (f) inversely proportionally using the following equation:
v = f * λ.
In this case, λ= 8 meter and f= 3 Hz
Then:
v= 3 Hz* 8 meter
So:
v= 24
<u><em>The speed is 24 </em></u><u><em></em></u>
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Answer:
5 ohms
Explanation:
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EMF of the ideal battery (E) = 60 V
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Current across the terminals (I) = 4 A
Let the internal resistance be 'r'.
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Now, rewriting in terms of 'r', we get:
Plug in the given values and solve for 'r'. This gives,
Therefore, the internal resistance of the battery is 5 ohms.
Answer:
D. Because mass and energy are both conserved, the total amounts of mass and energy are the same before and after impact.
Explanation:
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<u>Now, according to the law of conservation of energy:</u>
where:
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are their respective initial velocities.
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<u>Also the law of conservation of momentum is applicable in this case:</u>
In this case the velocity of the lighter mass will get increases in the final condition.