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tatyana61 [14]
3 years ago
10

Help science po this

Chemistry
1 answer:
liberstina [14]3 years ago
3 0
Answer: 1-Exhale 2-inhale 3-contracted diaphragm 4-relaxed diaphragm.
Step by step explanation: hope this helped! Have a great day.
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The chemical symbol for sodium is <br> a. na. <br> b. n. <br> c. s. <br> d. sn.
gayaneshka [121]
The chemical symbol for sodium is Na
8 0
4 years ago
What is the frequency of a photon of light (in Hz) that has an energy of 2.50 x 10-18 J?
ohaa [14]

Answer:

The answer is

3.77 \times  {10}^{15}  \:  \:  \: Hz

Explanation:

The frequency of the photon can be found by using the formula

f =  \frac{E}{h}  \\

where

E is the energy

f is the frequency

h is the Planck's constant which is

6.626 × 10-³⁴ Js

From the question

E = 2.50 × 10^-18 J

So we have

f =  \frac{2.50 \times  {10}^{ - 18} }{6.626 \times  {10}^{ - 34} }  \\

We have the final answer as

3.77 \times  {10}^{15}  \:  \:  \: Hz

Hope this helps you

5 0
3 years ago
If the Earth is at a perpendicular angle or right angle to the sun we will be experiencing...??
snow_tiger [21]

Answer:

angle

Explanation:

let us see the sun moves an a angle

5 0
3 years ago
Convert 0.020 kg of Sn to mg of Sn
Lapatulllka [165]
<h3>0.020 × 1000 × 100</h3>

<h2>= 2000 mg of Sn</h2>

hope that helps !

7 0
3 years ago
What element has 1 energy level and 2 valence electrons
Anvisha [2.4K]

Answer: Hydrogen and helium

Explanation:

3 0
3 years ago
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