2 years ago

What are tectonic plate boundaries?

Physics

2 answers:

Rasek [7]2 years ago

8 0

Answer:

Areas where earth crust experiences a high amount of stress

Explanation:

FCAT review question

Helga [31]2 years ago

4 0

Answer:

Explanation:

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Gravitational Potential Energy at earth surface $U_1=\frac{GM_em}{R_e}$

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Energy required to lift the satellite $E_1=U_1-U_2$

$E_1=\frac{GM_em}{R_e}-\frac{GM_em}{R_e+h}$

Now Energy required to orbit around the earth

$E_2=\frac{1}{2}mv_{orbit}^2=\frac{GM_2m}{2(R_e+h)}$

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$\Delta E=\frac{GM_em}{R_e}-\frac{GM_em}{R_e+h}-\frac{GM_2m}{2(R_e+h)}$

$E_1=E_2$ (given)

$\frac{GM_em}{R_e}-\frac{GM_em}{R_e+h}-\frac{GM_2m}{2(R_e+h)}=0$

$\frac{1}{R_e}-\frac{3}{2(R_e+h)}=0$

$h=\frac{R_e}{2}$

$h=3.19\times 10^6\ m$

(b)For greater height $E_1$ is greater than $E_2$

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Jackson ran in a marathon for 3 hours. The marathon was 185 miles long. How fast was the runner running?

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What is the kinetic energy of an object that has a mass of 50.0 kg and a velocity of 18 m/s? A.450 J B.900 J C.8,100 J D.16,000

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KE = (1/2)·(mass)·(speed)²

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