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JulijaS [17]
3 years ago
15

Why is it important we uncover and study fossils?

Physics
2 answers:
Ilia_Sergeevich [38]3 years ago
4 0

its important so we can learn things about the species  

timama [110]3 years ago
4 0

[ Answer ]

\boxed{We \ can \ use \ the \ past \ to \ learn \ about \ the \ future}

[ Explanation ]

When studying fossils, we can get a better image of how the Earth has changed through time. Fossils are no longer living. They are the remains of once living things, so by studying them, we can get an image of how they differ from animals and plants in our "today world."

We can learn about the future by studying the past. Certain weather patterns might have caused a species to adapt or go extinct, thus causing us to discover them and explore and create new ideas about the Earth and its secrets.

We can learn about life in the past from fossils. Fossils give us an accurate answer to all our guesses and hypothesis's. When studying these creatures or animals, we are able to sharpen our knowledge of the past.

\boxed{[ \ Eclipsed \ ]}

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The current theory of the structure of the Earth, called plate tectonics, tells us that the continents are in constant motion.
lesya [120]

Answer:

(a) m = 1.6 x 10²¹ kg

(b) K.E = 2.536 x 10¹¹ J

(c) v = 7.12 x 10⁵ m/s

Explanation:

(a)

First we find the volume of the continent:

V = L*W*H

where,

V = Volume  of Slab = ?

L = Length of Slab = 4450 km = 4.45 x 10⁶ m

W = Width of Slab = 4450 km = 4.45 x 10⁶ m

H = Height of Slab = 31 km = 3.1 x 10⁴ m

Therefore,

V = (4.45 x 10⁶ m)(4.45 x 10⁶ m)(3.1 x 10⁴ m)

V = 6.138 x 10¹⁷ m³

Now, we find the mass:

m = density*V

m = (2620 kg/m³)(6.138 x 10¹⁷ m³)

<u>m = 1.6 x 10²¹ kg</u>

<u></u>

(b)

The kinetic energy will be:

K.E = (1/2)mv²

where,

v = speed = (1 cm/year)(0.01 m/1 cm)(1 year/365 days)(1 day/24 h)(1 h/3600 s)

v = 3.17 x 10⁻¹⁰ m/s

Therefore,

K.E = (1/2)(1.6 x 10²¹ kg)(3.17 x 10⁻¹⁰ m/s)²

<u>K.E = 2.536 x 10¹¹ J</u>

<u></u>

(c)

For the same kinetic energy but mass = 77 kg:

K.E = (1/2)mv²

2.536 x 10¹¹ J = (1/2)(77 kg)v²

v = √(2)(2.536 x 10¹¹ J)

<u>v = 7.12 x 10⁵ m/s</u>

7 0
3 years ago
An object is transported to three different planets in our solar system. Which of the following is true about that object?
Digiron [165]

<u>Answer;</u>

<em>D.  The object’s weight changes, but its mass stays the same.</em>

<u>Explanation;</u>

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8 0
3 years ago
Read 2 more answers
Describe an application where a parallel circuit might work better than a series circuit
babunello [35]
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What happens to gravity when someone jumps up?
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5 0
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The picture below shows the setup for an experiment involving a 1000 mL beaker, sitting on a burner, filled with 500 mL of water
Vlad1618 [11]

Answer:

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Explanation:

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