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2 years ago

What changes were necessary in earth’s atmosphere to allow complex organism to evolve

Physics

2 answers:

jok3333 [9.3K]2 years ago

6 0

Answer:

Earth’s original atmosphere was rich in methane, ammonia, water vapor, and the noble gas neon, but it lacked free oxygen.Oxygen had to become a major atmospheric gas and the ozone layer had to develop.

Zepler [3.9K]2 years ago

5 0

A collision from above such as a meteor and an increase in volcano activity.

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Isabella is learning the parts of the cell and knows they require a structure to regulate the transfer of materials in and out.

MrMuchimi

Answer:

cell membrane

Explanation:

4 0

2 years ago

The metal with the highest melting temperature is tungsten which melts at around 3400 K. What is the wavelength of the peak of t

alekssr [168]

Explanation:

It is given that, the metal with the highest melting temperature is tungsten which melts at around 3400 K, T = 3400 K

We need to find the wavelength of the peak of the black body distribution for this temperature. It can be calculated using Wein's displacement law as :

$\lambda\times T=k$

k is the constant, $k=2.89\times 10^{-3}\ m.k$

$\lambda=\dfrac{k}{T}$

$\lambda=\dfrac{2.89\times 10^{-3}\ m.k}{3400\ k}$

$\lambda=8.5\times 10^{-7}\ m$

$\lambda=850\ nm$

The wavelength of infrared is from 700 nm to 1 mm. So, the lies in infrared region of the spectrum. Hence, this is the required solution.

7 0

3 years ago

Find the mass. 10 points. Will give brainliest.

TiliK225 [7]

Answer:

Explanation:

Given,

Force ( f ) = 30 N

Acceleration(a) = 7.6 m/s

Now, Let's find the mass of the ball

Using the Newton's second law of motion:

We get:

$force \: = mass \: \times acceleration$

plug the value

$30 \: = m \: \times 7.6$

Use the commutative property to reorder the terms

$30 = 7.6 \: m$

Swap the sides of the equation

$7.6m = 30$

Divide both sides of the equation by 7.6

$\frac{7.6 \: m}{7.6} = \frac{30}{7.6}$

Calculate

$m = 3.94 \: kg$

Hope this helps..

Best regards!!

7 0

2 years ago

Read 2 more answers

What is the universe made of?

RoseWind [281]

Answer:

Composition. The universe is composed almost completely of dark energy, dark matter, and ordinary matter. Other contents are electromagnetic radiation (estimated to constitute from 0.005% to close to 0.01% of the total mass-energy of the universe) and antimatter.

Explanation:

your answer

4 0

2 years ago

A motor has an internal resistance of 12.1 Ω. The motor is in a circuit with a current of

kotykmax [81]

Answer:

Explanation:

V = I * R

V = 4 * 12.1 = 48.4 v

7 0

2 years ago