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3 years ago

If you place rice on top or a speaker, what will happen to the rice when you turn the speaker on?

Chemistry

1 answer:

Dovator [93]3 years ago

3 0

Answer:

The rice will move

Explanation:

the sound vibration and waves will cause the rice to move

You might be interested in

Calculate the energy per photon (in J) associated with a frequency of 1260 kHz. Submit answer in scientific notation using the f

aniked [119]

Taking into account the definition of photon and energy of a photon, the energy per photon is 8.3538×10⁻³⁸ J.

<h3>Energy of a photon</h3>

Electromagnetic radiation carries energy, which can be absorbed or emitted. To explain the processes of emission and absortion, Plank and Einstein proposed that the energy of radiation is composed of indivisible units (quanta). In each elemental process only a quantum of light can be emitted or absorbed. Each of these quanta was called a "photon".

The exchanges of energy between matter and radiation take place not continuously, but by discrete and indivisible quantities or quanta of energy. The quantum of energy is proportional to the frequency of radiation.

The relationship between the amount of energy (E) transported by the photon and its frequency (f) is determined by the following expression:

E=h×f

where:

E is the energy of a photon.
h is the Planck's constant h.
f is the frequency of electromagnetic radiation.

<h3>Energy per photon</h3>

In this case, you know:

h= 6.63*10⁻³⁴ Js
f= 1260 kHz= 1,260,000 Hz= 1.26×10⁶ Hz (being 1 kHz=1000 Hz)

Replacing in the definition of energy of a photon:

E= 1.26×10⁶ Hz× 6.63×10⁻³⁴ Js

Finally, the energy per photon is 8.3538×10⁻³⁸ J.

Learn more about energy of a photon:

brainly.com/question/8924116

brainly.com/question/6945706

brainly.com/question/8000078

#SPJ1

6 0

2 years ago

Why does more carbon dioxide cause the water to be acidic?

joja [24]

<span>When carbon dioxide is passed through water, some of it dissolves. A small fraction of the dissolved CO2 interacts with the water to become carbonic acid, H2CO3.</span>

6 0

3 years ago

A 4.98g sample of aniline (C6H5NH2, molar mass is 93.13g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25kJ

natima [27]

the value of delta H° for aniline = -3201. 5 Kj/mol

<u><em> calculation</em></u>

Step 1: find heat

Q ( heat) = C ( specific heat capacity) x ΔT ( change in temperature)

C= 4.25 kj/c°

ΔT = 69.8-29.5 = 40.3 c°

Q= 4.25 kj/c x 40.3 c = 171.28 kj

Step 2: find the moles of aniline

moles = mass/ molar mass

= 4.98 g/ 93.13 g/mol =0.0535 moles

Step 3 : find delta H

171.28 kj / 0.0535=3201.5 kj/mol

since the reaction is exothermic delta H = -3201.5 Kj/mol

3 0

3 years ago

Examine the image of a potassium atom. (Image is below)

Bess [88]

Answer:

The answer to your question is D.

Explanation:

Potassium has 4 energy levels in the first level (A) has only 2 electrons,

in the second energy (B) level has 8 electrons, in the third energy level (C) also has 8 electrons and in the fourth energy level has only one electron.

Valence electrons are located in the outermost shell so Potassium has only one electron located in the shell D.

7 0

4 years ago

Fe(s) + S(s) → FeS(s)

insens350 [35]

The mass of FeS formed : 11.97 g

<h3>Further explanation</h3>

Reaction

Fe(s) + S(s) → FeS(s)

mass Fe=7.62 g

mol Fe(MW=56 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{7.62}{56}\\\\mol=0.136$

mass S=8.67 g

mol S(MW=32 g/mol) :

$\tt mol=\dfrac{8.67}{32}=0.271$

Limiting reactant : smaller ratio(mol:coefficient) ⇒coefficient=1

Fe : S =0.136 : 0.271⇒Fe limiting(smaller), S excess

Mol FeS based on Fe , so mol FeS=0.136

Mass FeS(MW=88 g/mol) :

$\tt mass=mol\times MW\\\\mass=0.136\times 88=11.97~g$

5 0

3 years ago