Two sound waves are emitted from identical sources at the same time. They each travel a distance of 10 m, but one wave reaches t
he destination faster than the other. What can you conclude about the two waves?
2 answers:
Answer:
Faster one has a lower frequency and higher wavelength.
Explanation:
The waves have properties such as frequency and wavelength. If the distance they travel is the same but one wave is faster than the other one, the faster wave must have a lower frequency and higher wavelength as it can be seen in this graph from Encyclopedia Britannica.
I hope this answer helps.
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Answer:
Argon
Explanation:
The average kinetic energy of the particles in a gas is given by
where
m is the mass of the particles
v is their rms speed
The average kinetic energy of the particles in a gas can also be written as
where
k is the Boltzmann's constant
T is the absolute temperature of the gas
Combining the two equations,
We can re-write the equation as
We see that:
- The speed is directly proportional to the square root of the temperature
- The speed is inversely proportional to the square root of the mass of the particles
Therefore, if the two gases are at same temperature, the particles will move faster in the gas with lighter particles (smaller mass).
Since Krypton atoms have larger mass than Argon atoms, it means that atoms in Argon move faster than in Krypton.