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.

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.

Thus, the height of the Eiffel Tower to your head will be:

Total height of tower = 300.5 m

Your assumed height = 1.5 m

Height (h) = 300.5 – 1.5

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

H = ½gt²

299 = ½ × 10 × t²

299 = 5 × t²

Divide both side by 5

Take the square root of both side

Therefore, the time taken for the croissant to hit you on the head assuming you are 1.5 m tall is 7.73 s

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"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"