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Sphinxa [80]
3 years ago
7

The distance between two consecutive nodesof a standing wave is 20.9cm.Thehandgen-erating the pulses moves up and down throughac

ompletecycle2.57 times every 4.47 s.Find the velocity of the wave.
Physics
1 answer:
irina1246 [14]3 years ago
4 0

Answer:

Velocity, v = 0.239 m/s

Explanation:

Given that,

The distance between two consecutive nodes of a standing wave is 20.9 cm = 0.209 m

The hand generating the pulses moves up and down through a complete cycle 2.57 times every 4.47 s.

For a standing wave, the distance between two consecutive nodes is equal to half of the wavelength.

\dfrac{\lambda}{2}=0.209\ m\\\\\lambda=0.418\ m

Frequency is number of cycles per unit time.

f=\dfrac{2.57}{4.47}\\\\f=0.574\ Hz

Now we can find the velocity of the wave.

Velocity = frequency × wavelength

v = 0.574 × 0.418

v = 0.239 m/s

So, the velocity of the wave is 0.239 m/s.

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A system had 150 kj of work done on it and its internal energy increased by 60 kj. How much energy did the system gain or lose a
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The system loses 90 kJ of heat

Explanation:

We can answer the question by using the 1st law of thermodynamics, which states that:

\Delta U=Q-W

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In this problem, we have:

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.3.3: Populating a vector with a for loop. Write a for loop to populate vector userGuesses with NUM_GUESSES integers. Read integ
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Answer:

#include <iostream>

#include <vector>

using namespace std;

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  const int NUM_GUESSES = 3;

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int uGuess = 0;

for(i = 0; i <= userGuesses.size() - 1; i++){

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}

cout << endl;

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}

Explanation:

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