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gregori [183]
3 years ago
11

Which gas in earths atmosphere protects earth by reflecting ultraviolet radiation

Physics
1 answer:
lana66690 [7]3 years ago
4 0
It's the ozone layer (O3)
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The position function x (6.0 m) cos[(3p rad/s)t p/3 rad]gives the simple harmonic motionof a body. at t 2.0 s, what are the(a) d
Daniel [21]

The correct formula for this simple harmonic motion is:

x = (6.0) cos [ (3 pi) t + pi/3 ] 

 

A. Calculating for displacement x at t = 2:

x =6.0 cos (19/3 pi)
x = 6 (0.5)

x = 3 m

 

<span>B. Velocity is equivalent to the 1st derivative of the equation. v = dx / dt </span>

<span> Velocity v = dx/dt = -18 pi sin (3pi t + pi/3) </span>

v = - 18 pi sin (6pi + pi/3)

v = 49.0 m/s

 

<span>C. Acceleration is the 2nd derivative or the 1st derivative of velocity dv / dt</span>
Acceleration a = dv/dt = -54 pi^2 cos(3pi t + pi/3) 

a = -54 pi^2 cos(3pi * 2 + pi/3)

a = 386.34 m/s^2

D. Phase = pi/3 

E. frequency f= 3pi/2pi = 1.5Hz 


<span>F. period = 1/f = 1/1.5 = .6667sec </span>

5 0
4 years ago
Which part of Earth Is hotter ? Which part is colder ? Why ?
LekaFEV [45]

Explanation:

Dasht-e Loot, Iran is the hottest,, and the coldest is the East Antarctic Plateau. The reason that part of Iran is the hottest is because it's near the Arabian deserts, and as you know the deserts can be pretty hot. The coldest part of the Earth is that cold because it doesn't get as much sunlight, the reason for that is because they don't get any direct sunlight.

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4 years ago
Give 3 examples of momentum used in everyday life.
Arte-miy333 [17]

Answer:

waking up,eat,sleep

Explanation:

notice how i didn't say math :)

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Development is best described as:
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A. Change that normally occurs in people throughout their lifetimes.

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APEX verified

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Why does this image show static electricity
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It's shows static electricity because of the hair
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