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Korvikt [17]
3 years ago
15

Test anxiety symptoms can include

Chemistry
2 answers:
Ber [7]3 years ago
5 0
D.) all of the above
AfilCa [17]3 years ago
4 0

Answer:

D.) All of the above

Explanation:

Anxiety can cause sweating, chaky hands, headaches etc

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Sodium burns violet in a flame. What is the energy of this blue light if a photon released has a wavelength of 413nm
ludmilkaskok [199]

According to Einstein the energy of photon is given by the equation,

E = hν = h . c/λ

where h is Planck's constant, c is the speed of light, ν is the frequency of light and λ is the wavelength of light.

Given, wavelength of photon = 413 nm = 413 x 10⁻⁹ m

Conversion factor: 1 nm = 10⁻⁹ m

c = 3 x 10⁸ m/s

h = 6.626× 10⁻³⁴ J.s

Substituting the data into the equation we get,

E = h . c/λ

E = 6.626× 10⁻³⁴ J.s x (3 x 10⁸ m/s) / 413 x 10⁻⁹ m

E = 4.8 x 10⁻¹⁹ J

The energy of this blue light is  4.8 x 10⁻¹⁹ J

7 0
4 years ago
Elements in the same periodic table have the same
loris [4]
D is the correct answer.

The trend that follows a group (vertical lines) is that they each contain the same number of valence (outer) electrons
6 0
4 years ago
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Consute a tabela periódica e identifique o elemento químico ao qual corresponde cada item:
VMariaS [17]

Answer:

a

Explanation:

7 0
3 years ago
Which technology is NASA developing that will help astronauts reach Mars? Corona Freedom Orion Skylab
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Answer:

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3 years ago
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Angelina_Jolie [31]

Answer:

A

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The rubber is a non-conductin insulator

   the metal clamps with teeth and attached wires are the conductors of electrical current

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