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Rina8888 [55]
3 years ago
10

Assume that each large number is a centimeter. How long is this pencil? Only part of the pencil is shown. Pick the best estimate

.
A) 8.25 cm

B) 8.3 cm

C) 83 cm

D) 8.0 cm

Chemistry
1 answer:
Leviafan [203]3 years ago
5 0

From the figure we can notice that the tip is ended surely before 9 cm .

Also , the tip crossed two cuts after 8 .

Therefore , it is greater than 8.2 .

Now , if we see that the tip end between 2 and 3 .

Therefore , the best estimate is 8.25 cm .

Hence , this is the required solution .

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The sun produces ________ light , which is a combination of all the colors of light.
Licemer1 [7]
The sun produces white light, which is a combination of all the colors of light.
3 0
4 years ago
What is an example of a Low Energy-created depositional environment?
sweet-ann [11.9K]

Answer:

River flood plains, swamps, lakes, lagoons, marshes, and offshore.

Explanation:

Slow-moving currents prevent coarse-grained sediment from migrating into low-energy depositional environments. Fine materials can be carried long distances before they can settle out in the absence of waves and currents.

4 0
3 years ago
If a star is shown ti be 33.11 trillion killometers away , how many light year would that be
adoni [48]
Use proportions.

1 lightyear = <span>9.4605284 trillion kilometers
</span><span>x light years </span>≈<span> 33.31 </span>trillion kilometers
<span>
33.31/9.46 = x/1
3.50 </span>≈ x<span>

</span>
8 0
3 years ago
A small portion of a crystal lattice is sketched below. What is the name of the unit cell of this lattice? Your answer must be a
Nikolay [14]

This is an incomplete question, the given sketch is shown below.

Answer : The name of given unit cell is, FCC (face-centered cubic unit cell)

Explanation :

Unit cell : It is defined as the smallest 3-dimensional portion of a complete space lattice which when repeated over the and again in different directions produces the complete space lattice.

There are three types of unit cell.

  • SCC (simple-centered cubic unit cell)
  • BCC (body-centered cubic unit cell)
  • FCC (face-centered cubic unit cell)

In SCC, the atoms are arranged at the corners.

Z=\frac{1}{8}\times 8=1

The number of atoms of unit cell = Z = 1

In BCC, the atoms are arranged at the corners and the body center.

Z=\frac{1}{8}\times 8+1=2

The number of atoms of unit cell = Z = 2

The given unit cell is, FCC because the atoms are arranged at the corners and the center of the 6 faces.

Z=\frac{1}{8}\times 8+\frac{1}{2}\times 6=4

The number of atoms of unit cell = Z = 4

Thus, the name of given unit cell is, FCC (face-centered cubic unit cell)

7 0
4 years ago
A hydrogen atom with its electron in the n = 6 energy level emits a photon of IR light. Calculate (a) the change in energy of th
geniusboy [140]

Answer:

(a) The change in energy of the atom is --6.0528 X 10⁻²⁰ J

(b) The wavelength of the photon is 32841 Å

Explanation:

E = -kz²/n²

Where;

E is the change in the energy of the atom

k is a constant = 2.179 X 10¹⁸ J

z is the atomic number of hydrogen = 1

n = 6

E = -(1 X 2.179 X 10⁻¹⁸ )/6²

E = -6.0528 X 10⁻²⁰ J

Therefore,the change in energy of the atom is -6.0528 X 10⁻²⁰ J

(b) the wavelength (in Å) of the photon, can be calculated as follows;

E = hc/λ

λ = hc/E

where;

h is Planck's constant = 6.626 X 10⁻³⁴ js

c is the speed of light = 3 X 10⁸ m/s

λ  is the wavelength of the photon

λ  = (6.626 X 10⁻³⁴ X 3 X 10⁸ )/(6.0528 X 10⁻²⁰)

λ  = 3.2841 X 10⁻⁶ m

λ  = 32841 Å

Therefore, the wavelength of the photon is 32841 Å

3 0
3 years ago
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