You are walking in Paris alongside the Eiffel Tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy dandy tourist guidebook you find that the height of the Eiffel Tower is 300.5 m. If you neglect air resistance, calculate how many seconds the croissant dropped before it tagged you on the head.
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I will assume that you are 1.8 m tall, so the distance the bagel falls before it hits you on the head is
300.5 m - 1.8 m = 298.7 m
One of the important equations relating distance and acceleration is
s = v₀ +½at², where
s = distance,
v₀ = initial velocity,
a = acceleration, and
t = time.
I also assume that the person at the top of the tower didn't throw the bagel down at you, so v₀ = 0.
a is the acceleration due to gravity, which is 9.8099 m·s⁻² in Paris.
s = v₀ + ½ at²
298.7 m = 0 + ½ × 9.8099 m·s⁻² × t²
298.7 = 4.9050 t² s⁻²
t² =
t =
The time taken for the croissant to hit you on the head assuming you are 1.5 m tall is 7.73 s
Considering the question given above, your height was not stated.
Let your height be 1.5 m
Thus, the height of the Eiffel Tower to your head will be:
Height (h) = (Total height of tower) – (Your assumed height)
Total height of tower = 300.5 m
Your assumed height = 1.5 m
Height (h) = 300.5 – 1.5
Height (h) = 299 m
Finally, we shall determine the time taken for the croissant to hit you on the head.
Height (h) = 299 m
Acceleration due to gravity (g) = 10 m/s²
Time (t) =?
H = ½gt²
299 = ½ × 10 × t²
299 = 5 × t²
Divide both side by 5
Take the square root of both side
t = 7.73 s
Therefore, the time taken for the croissant to hit you on the head assuming you are 1.5 m tall is 7.73 s
Learn more: brainly.com/question/19168584
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Option 2
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Explanation:
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since one mole sodium chloride dissolve in water and it dissociate into two ions i.e. Na⁺ and Cl⁻
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Explanation:
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Final answer:
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Explanation:
Scientists use results from new experiments to both confirm existing theories and explore new territories of knowledge. Conducting an experiment helps scientists gather data and observations. These results then provide evidence that either supports or refutes a hypothesis, leading to more advanced and precise scientific theories. For example, when Albert Einstein proposed his theory of relativity, further experiments such as the Eddington experiment during a solar eclipse provided data evidence that supported his theory.
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Explanation:
To calculate the percentage volume by volume of a solute in a solution, we use the formula:
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Volume of solution = 2.5 L = 2500 mL (Conversion factor: 1 L = 1000 mL)
Putting values in above equation, we get:
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( V / V ) = ( 50 / 2500 ) x 100
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hope this helps!