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andre [41]
3 years ago
6

Shortly after the Earth first formed, intense heat built up and large portions of the planet became molten. What happened to the

Earth over time?
Physics
2 answers:
maksim [4K]3 years ago
5 0

Parts of the Earth cooled into solid rock!! I got this in a study island and got it right!!

Drupady [299]3 years ago
3 0
The Earth cooled down, forming water on vast lands while leaving others dry. oxygen and carbon from volcanoes helped create plant life under water, away from the sun's harmful UV rays. Eventually, the plants created enough oxygen to create an ozone layer around earth, making our planet sustainable for life, thus, creating life or as we can call it, one celled organisms. These cells would eventually evolve into bigger life forms, like the dinosaurs.

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The initial and final velocities of two blocks experiencing constant acceleration are respectively −7.45 m/s and 14.9 m/s. (a) T
ikadub [295]

Answer:

a) a_{1}=3.7 m/s^{2}

b) a_{2}=3.68 m/s^{2}

Explanation:

a) The displacement of the first object is 22.5 m, so we can use the next equation:

v_{f}^{2}=v_{i}^{2}+2a\Delta x

a=\frac{v_{f}^{2}-v_{i}^{2}}{2x}

a=\frac{14.9^{2}-(-7.45)^{2}}{2*22.5}

a_{1}=3.7 m/s^{2}

positive acceleration.

b) Using the same equation we can find the second value of the acceleration:

a=\frac{v_{f}^{2}-v_{i}^{2}}{2x}

a=\frac{14.9^{2}-(-7.45)^{2}}{2*22.6}

a_{2}=3.68 m/s^{2}

positive acceleration.

I hope it helps you!

8 0
3 years ago
Two students walk in the same direction along a straight path at a constant speed. One walks at a speed of 0.90 m/s and the othe
mr Goodwill [35]

Answer:

A. 456 seconds

Explanation:

We are given that two students walk in the same direction along a straight path at a constant speed.

One student walks with a speed=0.90 m/s

second student walks with speed=1.9 m/s

Total distance covered by each students=780 meter

We have to find who is faster and how much time  extra taken by slower student than the faster student.

Time taken by one student who travel with speed 0.90 m/s=\frac{780}{0.90}

Time=\frac{distance}{speed}

Time taken by one student who travel with speed 0.90 m/s

=\frac{780}{0.90}

Time taken by one student who travel with speed 0.90 m/s

=866.6 seconds

Time taken by second student who travel with speed 1.9 m/s=\frac{780}{1.9}

=410.5 seconds

The second student who travels with speed 1.9 m/s is faster than the student travels with speed 0.90 m/s .

Extra time taken by the student travels with speed 0.90 m/s=866.6-410.5=456.1 seconds

Extra time taken by the student travels with speed 0.90 m/s=456 seconds

Hence, option A is true.

7 0
3 years ago
Read 2 more answers
2. What does the term reflection mean?
Vesna [10]

Answer:

egrfeirugherhgourehgabgwehgoehborghrewuhgelkg

Explanation:

4 0
3 years ago
In which century was the DNA database established?
krok68 [10]
DNA database was established in 1995
8 0
3 years ago
The corpus callosum is comprised of more than 200 million axons that connect the hemispheres of the brain. Please select the bes
mamaluj [8]

Hello, love! The answer is True, or T, on Edge2020.

Hope this helped!

~ V.

8 0
3 years ago
Read 2 more answers
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