The two waves shown here are the same distance from point x and are traveling toward each other
2 answers:
Answer:
A). 0.0 cm
Explanation:
When two waves travel and meet at the same point, a phenomenon known as interference occurs.
The two extreme cases of interference are the following:
- When two waves in phase meet at the same point, the resultant wave produced by the interference has amplitude which is the sum of the amplitude of the individual waves
- When two waves in anti-phase meet at the same point, the resultant wave produced by the interference has amplitude which is the difference between the amplitudes of the individual waves
In this problem, we have two waves of amplitde A1 = 2.0 cm and A2 = 2.0 cm that meet at X in anti-phase (because they have opposite displacement): therefore, it is a destructive interference, and the resultant amplitude will be
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Answer:
0.0321 g
Explanation:
Let helium specific heat
Assuming no energy is lost in the process, by the law of energy conservation we can state that the 20J work done is from the heat transfer to heat it up from 273K to 393K, which is a difference of ΔT = 393 - 273 = 120 K. We have the following heat transfer equation:
where is the mass of helium, which we are looking for: