Firework Height Calculation: 712m, 23.6°C, Timer

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To calculate the height of the firework explosion, the horizontal distance of 712 m and the air temperature of 23.6°C are crucial, as they affect the speed of sound. The speed of sound can be determined using the temperature, which allows for calculating the time it takes for the sound to travel that distance. Understanding the relationship between the time measured and the height of the firework involves basic physics principles. A diagram can help visualize the problem, highlighting known distances and deducing unknowns. Ultimately, the participant successfully solved the problem independently.
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Homework Statement
You are standing at a horizontal distance of 712 m from the location from which fireworks are being shot straight up. The temperature of the air this night is 23.6°C. The timer below measured the time from the explosion to when the sound reached your ears. Use all this information to find the height at which the firework exploded.This was an extra credit question, but my teacher never really went over this topic, so I don't really know where to start. Any help would be appreciated, thanks!
 
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If the firework wasn't in the air when it went off, but was on the ground some horizontal distance away from you, how would you find the distance? How does that distance between you and the firework change as it rises? The speed of sound depends on temperature, which is why it's given.
 
leedia said:
Homework Statement
You are standing at a horizontal distance of 712 m from the location from which fireworks are being shot straight up. The temperature of the air this night is 23.6°C. The timer below measured the time from the explosion to when the sound reached your ears. Use all this information to find the height at which the firework exploded.This was an extra credit question, but my teacher never really went over this topic, so I don't really know where to start. Any help would be appreciated, thanks!
Draw a diagram. What distance do you know? What distance can you deduce from the timing information?
 
Nevermind, I figured it out myself. Thanks! :)
 
leedia said:
Nevermind, I figured it out myself. Thanks! :)
That's the best outcome.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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