3 years ago

How do fossils provide evidence that evolution has occurred?

1 answer:

3 0

Well preservation

Explanation:
Fossil are dead remains of ancient creatures. By examining them carefully, scientists can predict about the habitat,nutrition form, body tissues ,morphology of creatures and hence it gives clues about evolution .

You might be interested in

Ball A was carried to the top of a hill in a straight line, while ball B was carried in a longer, zigzag path. At the top of the

marissa [1.9K]

Answer: equal

Explanation:

Don’t know why honestly

5 0

3 years ago

Read 2 more answers

Calculate the change in the energy of an electron that moves from the n = 3 level to the n = 2 level. What type of light is emit

marissa [1.9K]

Answer:

Red light

Explanation:

The energy emitted during an electron transition in an atom of hydrogen is given by

$E=E_0 (\frac{1}{n_2^2}-\frac{1}{n_1^2})$

where

$E_0 = 13.6 eV$ is the energy of the lowest level

n1 and n2 are the numbers corresponding to the two levels

Here we have

n1 = 3

n2 = 2

So the energy of the emitted photon is

$E=(13.6) (\frac{1}{2^2}-\frac{1}{3^2})=1.9 eV$

Converting into Joules,

$E=(1.9 eV)(1.6\cdot 10^{-19} J/eV)=3.0\cdot 10^{-19} J$

And now we can find the wavelength of the emitted photon by using the equation

$E=\frac{hc}{\lambda}$

where h is the Planck constant and c is the speed of light. Solving for $\lambda$ ,

$\lambda=\frac{hc}{E}=\frac{(6.63\cdot 10^{-34})(3\cdot 10^8)}{3.0\cdot 10^{-19}}=6.63\cdot 10^{-7} m = 663 nm$

And this wavelength corresponds to red light.

5 0

2 years ago

Sound waves can travel through which mediums?

aksik [14]

Answer:

B. Solids, liquids, and gases.

Explanation:

I have no explanation.

5 0

2 years ago

Which of the following tools measures weight? A balance A scale A cyclometer A graduated cylinder

Kazeer [188]

I'm pretty sure its a scale.

8 0

3 years ago

Convert 3.2 kilometers to feet?

Tanzania [10]

Answer:

10498.7 feet

Explanation:

7 0

2 years ago

Read 2 more answers