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3 years ago

Based on the second law of thermodynamics, how would you expect a system to change over time?

2 answers:

5 0

Endless movement between hot and cold will eventually mean the end of the universe. This law is about inefficiency, degeneration and decay. <u>The second law can be expressed in several ways, the simplest being that heat will naturally flow from a hotter to a colder body. At its heart is a property of thermodynamic systems called entropy.</u> Entropy basically means an increase in randomness. Hope this helps mate.

tatiyna3 years ago

5 0

B. It's randomness would increase.

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The energy levels of a quantum harmonic oscillator are given by En = n + 1 2 ¯h ω where 2π ¯h = h and h is Planck’s Constant. Th

PolarNik [594]

Answer:

2πc/w

Explanation:

To find the wavelength you take into account the difference in energy of two adjacent states n+1 and n:

$E_{n+1,n}=\hbar \omega((n+1)+\frac{1}{2})+\hbar \omega(n+\frac{1}{2})\\\\E_{n+1,n}=\hbar \omega$ (1)

hbar = h/2π

this energy is also the energy of an emitted photon in the transition, that is:

$E_{\lambda}=h\frac{c}{\lambda}$ (2)

you equal the equations (1) and (2) and compute the wavelength:

$E_{\lambda}=E_{n+1,n}\\\\h\frac{c}{\lambda}=\frac{h}{2\pi}\omega\\\\\lambda=\frac{2\pi c}{\omega}$

hence, the wavelength of the emitted photon is 2πc/w

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3 years ago

What is the role of the midbrain, and which part of the midbrain is important for arousing the forebrain?

Rainbow [258]

Answer:

The fore-brain consists of the cerebrum, thalamus, and hypothalamus. Mid-brain relays information between fore-brain and hind-brain. Mid-brain plays important role in developing motor functions like eye movement, auditory functions and visual processing. The crus cerebri connects the cerebral hemispheres to the cerebellum, contains a portion having a network of neurons that is responsible for arousal and alertness.

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2 years ago

Which statement best describes copper?

ira [324]

Answer:

D. It has a low resistance and allows charges to move freely.

Explanation:

The high conductivity of copper allow charges to move freely without the need of too much force. The conductivity decreases with increase in resistance. Low resistance also means less heating of the conductors. This property of copper makes it ideal for use in the manufacture of electric cables and conductors for various gadgets.

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3 years ago

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SVETLANKA909090 [29]

Answer:

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Explanation:

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3 years ago

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makkiz [27]

Answer:

They move outwards.

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Explanation:

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3 years ago

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