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Dani69
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#1
I was wondering if someone could help me. How i can calculate diameter of baby head if there is time delay of 96 microseconds between receiving pulses from either side of the skull , and the speed of the ultrasounds is 1250 m/s?
Thank you
Thank you
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squidge_gt
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#2
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#2
How much further has the sound wave to the opposite side of the head travelled than the one to the near side? If you know this, then you can use this, the time delay and the speed of sound to calculate the diameter
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Dani69
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#3
(Original post by squidge_gt)
How much further has the sound wave to the opposite side of the head travelled than the one to the near side? If you know this, then you can use this, the time delay and the speed of sound to calculate the diameter
How much further has the sound wave to the opposite side of the head travelled than the one to the near side? If you know this, then you can use this, the time delay and the speed of sound to calculate the diameter
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Stonebridge
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#4
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#4
(Original post by Dani69)
Thank you but these are all details that I have in the question-do I have to multiply the values i was given?
Thank you but these are all details that I have in the question-do I have to multiply the values i was given?
so yes.
Just make sure that you remember that a microsecond is 10-6 seconds.
Last edited by Stonebridge; 11 months ago
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Dani69
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#5
(Original post by Stonebridge)
Distance = speed x time
so yes.
Just make sure that you remember that a microsecond is 10-6 seconds.
Distance = speed x time
so yes.
Just make sure that you remember that a microsecond is 10-6 seconds.
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squidge_gt
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#6
(Original post by Dani69)
Thank you so much indeed.
Thank you so much indeed.
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Dani69
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#7
I am getting a bit confused now...Do I have to divide 96 microseconds by 2 ?
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ThiagoBrigido
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#8
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#8
(Original post by Dani69)
I am getting a bit confused now...Do I have to divide 96 microseconds by 2 ?
I am getting a bit confused now...Do I have to divide 96 microseconds by 2 ?
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Dani69
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#9
(Original post by ThiagoBrigido)
Post #4 already gave you the answer. What is the diameter? What are you trying to find?
Post #4 already gave you the answer. What is the diameter? What are you trying to find?
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Stonebridge
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#10
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#10
(Original post by Dani69)
Trying to find diameter of baby head with these values i was given
Trying to find diameter of baby head with these values i was given
What do they mean by 'delay' here?
It seems like they are saying that it takes 96 microseconds for the sound to pass through the head at the given speed.
I wouldn't call that a 'delay' exactly, more an 'interval'.
If this is what they mean then you just multiply the 2 values given as I said.
The other meaning of 'delay' would require a different calculation where you would need to be given the speed of the sound waves in air and compare the time taken for the sound to travel through the head with the time taken to travel through thin air.
In this case the sound through the head would arrive earlier that the thin air sound as it travels faster through a solid - in this case the head.
So in effect there would not be a 'delay'. At least not the sound wave we are talking about.
With just the information given in this question, the 1st interpretation seems logical.
So my original reply is still the best bet.
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squidge_gt
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#11
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#11
(Original post by Stonebridge)
I think the wording of the question is a little confusing.
What do they mean by 'delay' here?
It seems like they are saying that it takes 96 microseconds for the sound to pass through the head at the given speed.
I wouldn't call that a 'delay' exactly, more an 'interval'.
If this is what they mean then you just multiply the 2 values given as I said.
The other meaning of 'delay' would require a different calculation where you would need to be given the speed of the sound waves in air and compare the time taken for the sound to travel through the head with the time taken to travel through thin air.
In this case the sound through the head would arrive earlier that the thin air sound as it travels faster through a solid - in this case the head.
So in effect there would not be a 'delay'. At least not the sound wave we are talking about.
With just the information given in this question, the 1st interpretation seems logical.
So my original reply is still the best bet.
I think the wording of the question is a little confusing.
What do they mean by 'delay' here?
It seems like they are saying that it takes 96 microseconds for the sound to pass through the head at the given speed.
I wouldn't call that a 'delay' exactly, more an 'interval'.
If this is what they mean then you just multiply the 2 values given as I said.
The other meaning of 'delay' would require a different calculation where you would need to be given the speed of the sound waves in air and compare the time taken for the sound to travel through the head with the time taken to travel through thin air.
In this case the sound through the head would arrive earlier that the thin air sound as it travels faster through a solid - in this case the head.
So in effect there would not be a 'delay'. At least not the sound wave we are talking about.
With just the information given in this question, the 1st interpretation seems logical.
So my original reply is still the best bet.
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Stonebridge
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#12
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#12
It all points to the fact that, without a bit more context and the theory that this is meant to test, it is difficult to give a meaningful reply.
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Alia62737
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#13
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#13
(Original post by Dani69)
I was wondering if someone could help me. How i can calculate diameter of baby head if there is time delay of 96 microseconds between receiving pulses from either side of the skull , and the speed of the ultrasounds is 1250 m/s?
Thank you
I was wondering if someone could help me. How i can calculate diameter of baby head if there is time delay of 96 microseconds between receiving pulses from either side of the skull , and the speed of the ultrasounds is 1250 m/s?
Thank you
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