I think the answer is c but I'm not sure
Answer:
im pretty sure its because wax has i higher melting point therefore it would cool quicker if the temperature dropped more. water has a lower melting point so it takes longer to freeze i think. i hope this helps
Answer:
The Speaker of the House is responsible for administering the oath of office to the Members of the U.S. House of Representatives, giving Members permission to speak on the House floor, designating Members to serve as Speaker pro tempore, counting and declaring all votes, appointing Members to committees, sending bills Explanation:
Answer:
the shortest distance to the obstruction is 0.431 m
Explanation:
We can see this system as an air column, where the plumber is open and where the water is closed, in the case when he hears the sound there is a phenomenon of resonance and superposition of waves with constructive interference.
For the lowest resonance we must have a node where the water is and a maximum where the plumber is a quarter of the wavelength
λ = ¼ L
If we are in a major resonance specifically the following resonance. We have a full wavelength plus a quarter of the wavelength
λ = 4L / 3
The general formula is
λ = 4L / n n = 1, 3, 5, 7,…
In addition the wave speed is the product of the frequency by the wavelength
v = λ f
Let's replace
v = (4L / n) f
L = v n / (4 f)
Now we can calculate the depth or length of the air column
If we have the first standing wave n = 1
L = 340 1 / (4 197)
L = 0.431 m
If it is the second resonance n = 3
L = 340 3 / (4 197)
L = 1.29 m
We can see the shortest distance to the obstruction is 0.431 m
I think it's A) Sunspots. I hope this helps:)
