Hello, this is the answer of the first question of the Eiffel tower's problem. We can't do the others questions because the picture is too little. Can you send a bigger please ? Thank you. ABC is isoscele in C. We call [AH] the leaving height of A. [AH] divide BA in two equal segments : CH= c×1/2= 97,5×1/2= 48,75 m [AH] is perpendicular to (AB) so AHC is a right-angle triangle. We can use the propriety of Pythagore : HC² + AH² = CA² 48,5² + 800² = CA² 2376,2 + 640000 = CA² 642376,2 = CA² The 642376,2's square root is equal to 801,5]]>CA = b = a = 801,5mNow, we can use trigonometry: cos(Ĉ) = 800/801,5 Ĉ = cos-1×800/801,5 ≈ 3,5° Cos(Â) = 48,5/801,5 Â = cos-1×48,5/801,5 ≈ 86,5°

320=1/2 x 9,81 x T^{2}

320 x 2=9,81 x T^{2}

640=9,81 x T^{2}

T=√640/9,81

T=8

The time that will take a man who jump out from the top of the eiffel tower to reach the ground will be of approximately 8s.

**Question 2 : **

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S=9,81 x 60^{2 }x ½

S=(9,81 x 3600)/2

S=35316/2

S=17658

If you want to fall in 1 minute, you must be at 17658 m of the ground or 17,658 km.

**Question 3 :**

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I think that it was possible on this planet but ti will be very difficult.

]]>- The equation of the second fonction is f(x)=-2X+3

- The equation of the third fonction is f(x)=(2/5)X-1

- The equation of the fourth fonction is f(x)=-(5/2)X-1

- The equation of the last fonction is f(x)=1

For the first question,

m = 225 g = 0.225 kg

g = 9.82 m/s

d = 300 m

potential energy = m x g x d = 0.225 x 9.82 x 300 = 662.85 j

For the second question,

It's the same result because when it hits the ground : potential energy = kinetic energy.

Thank you for your cooperation

]]>What is the electronic structure of the atom of phosphore P knowing it is below the atom of azote N in the periodic classification ?

What is the caracteristic of atoms in a same line ?

And in the same column ?

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