The siren on an ambulance emits a sound of frequency 2.80x10^3 Hz. If the ambulance is traveling at 26.0 m/s (93.6 km/h, or 58.2 mi/h), the speed of sound is 340 m/s, and the air is still, what are the frequency and wavelength that you hear if you are standing (a) in front of the ambulance or (b) behind the ambulance? Answer: (a) 3.03x10^3 Hz and 0.112 m (b) 2.60x10^3 Hz and 0.131 m Can you explain this sir??? Plsplssss, for I don't know how to solve and explain it. Thank you
Fahrenheit is a more precise scale than Celsius, the difference in temperature between each degree is smaller. Also, outside of science, people just don't use it correctly. How may times have you heard the typical height of a man is 2 meters when it is actually 1.7018 (5'7) I see this daily where people round up the metric system because "it's easier" I am a design build contractor and all I hear is that a meter equals a yard when 3 feet is actually 0.9144 yards. Again, I get that you are in science but it is really annoying the way normal people use the metric system.
@@Woodman-Spare-that-tree Yes, people who cannot think for themselves :) Think about it and the next time you here someone say a football field is 100 meters, remember, it's really 109.728 meters and if the guy with the football only went 100 meters, he would be short of a touch down. So either start using the metric system accurately or stop :)
@@ArtisanTony The way people round numbers has nothing to do with the "precision" of the unit. We are supposed to round values whatever the unit comparatively to the uncertainty of the "measurement". The very simplified rule is to keep one digit more than the first (often unique) significant digit of the uncertainty. In your example if we stay with 1 m as the uncertainty you must write the length 109.7 m. In practice we will have difficulties to measure more precisely than with an uncertainty of 1 cm then writing the length 109.728 m is then appropriate. If you are not better concerned by the accuracy to the point of considering that your uncertainty is 10 m then the correct writing of the length is 110 m. length (m) = 109.7 ± 1 length (m) = 109.728 ± 0.01 length (m) = 110 ± 10
@@gide5489 I am talking about the way people use the metric system. They say a man is 2 meters tall and do not think about what they are saying. When I use imperial units, I am being specific.
![Convert Celsius to Kelvin & Fahrenheit Temperature in Chemistry - [1-1-10]](http://i.ytimg.com/vi/Mr323ojToHU/mqdefault.jpg)
😲 Dear teacher I am very glad to give me your lesson thank you very much dear teacher keep going 💕❤️👑your are king teacher's 👍
Thank you much appreciated your teaching
Use the word vibration to describe and define temperature.
I like this lesson it is interesting
Excelente explanations
Thanks sir
Thank you very much, Jason )
You're very welcome!
The siren on an ambulance emits a sound of frequency 2.80x10^3 Hz. If the ambulance is traveling at 26.0 m/s (93.6 km/h, or 58.2 mi/h), the speed of sound is 340 m/s, and the air is still, what are the frequency and wavelength that you hear if you are standing (a) in front of the ambulance or (b) behind the
ambulance?
Answer:
(a) 3.03x10^3 Hz and 0.112 m
(b) 2.60x10^3 Hz and 0.131 m
Can you explain this sir??? Plsplssss, for I don't know how to solve and explain it. Thank you
Sir do you have any knowledge about marine engineering? If it is please share with me because that will be my career
Hello Sir, can you please also do a video on stoichiometry in chemistry
Google it
Here is what I have found, take C and multiply by two. Then subtract ten percent to get your 1.8.
May I ask if altitude or pressure has an effect on temperature (Tc)?
The temperature lapse rate for altitude increase is about 9.8deg C for every 1000m increase
The boiling point will reduce for a liquid with altitude increase
Pressure squashes all the molecules closer together. Therefore they have less space to move around in. We experience this as heat.
Fahrenheit is a more precise scale than Celsius, the difference in temperature between each degree is smaller. Also, outside of science, people just don't use it correctly. How may times have you heard the typical height of a man is 2 meters when it is actually 1.7018 (5'7) I see this daily where people round up the metric system because "it's easier"
I am a design build contractor and all I hear is that a meter equals a yard when 3 feet is actually 0.9144 yards. Again, I get that you are in science but it is really annoying the way normal people use the metric system.
“normal” people?
@@Woodman-Spare-that-tree Yes, people who cannot think for themselves :) Think about it and the next time you here someone say a football field is 100 meters, remember, it's really 109.728 meters and if the guy with the football only went 100 meters, he would be short of a touch down. So either start using the metric system accurately or stop :)
@@ArtisanTony The way people round numbers has nothing to do with the "precision" of the unit. We are supposed to round values whatever the unit comparatively to the uncertainty of the "measurement". The very simplified rule is to keep one digit more than the first (often unique) significant digit of the uncertainty.
In your example if we stay with 1 m as the uncertainty you must write the length 109.7 m. In practice we will have difficulties to measure more precisely than with an uncertainty of 1 cm then writing the length 109.728 m is then appropriate. If you are not better concerned by the accuracy to the point of considering that your uncertainty is 10 m then the correct writing of the length is 110 m.
length (m) = 109.7 ± 1
length (m) = 109.728 ± 0.01
length (m) = 110 ± 10
@@gide5489 I am talking about the way people use the metric system. They say a man is 2 meters tall and do not think about what they are saying. When I use imperial units, I am being specific.
@@ArtisanTony no you are just being American
YESSIRRRRR
Interesting...; the history of why temperature choice of measurement doesn't matter. 🧐
I think the unit forhenheit is used in America.
So you are an electrical engineer! , sir
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