2 years ago

Which of the following is a science?

Physics

1 answer:

nikitadnepr [17]2 years ago

3 0

Answer:

astrology

Explanation:

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What is the power of a refrigerator with voltage 110 V and<br> current 0.8 A?

tia_tia [17]

Answer: 88

Explanation:

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2 years ago

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

ivann1987 [24]

Answer:

$2.46\cdot 10^5 J$

Explanation:

The energy of a single photon is given by:

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

where

h is the Planck constant

c is the speed of light

$\lambda$ is the wavelength

For the photon in this problem,

$\lambda=486 nm=4.86\cdot 10^{-7}m$

So, its energy is

$E_1=\frac{(6.63\cdot 10^{-34} Js)(3\cdot 10^8 m/s)}{4.86\cdot 10^{-7}m}=4.09\cdot 10^{-19} J$

One mole of photons contains a number of photons equal to Avogadro number:

$N_A = 6.022\cdot 10^{23}$

So, the total energy of one mole of photons is

$E=N_A E_1 = (6.022\cdot 10^{23})(4.09\cdot 10^{-19} J)=2.46\cdot 10^5 J$

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3 years ago

Sea anemones can produce completely new organisms by regeneration. Are these new organisms genetically identical to the parents?

liq [111]

The offspring would genetically identical to the parents because regeneration is a form of asexual reproduction.

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3 years ago

Which two types of information are found in an elements box in the periodic table

Pani-rosa [81]

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Each box represents an element and contains its atomic number, symbol, average atomic mass, and (sometimes) name.

Explanation:

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2 years ago

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What is the chemical name of SiF4? sulfur fluoride silicon fluoride sulfur tetrafluoride silicon tetrafluoride

baherus [9]

Answer:

Silicon tetrafluoride

Explanation:

The symbol Si represents the element silicon, as shown in the periodic table.

The are 4 fluorines, so the prefix for fluoride must have tetra-

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