Physics, 21.09.2019 05:10 Key1431

Consider the s- operator (the spin operator in the z-direction), and the sy operator (the spin operator in the y-direction). a. in the z-basis: i. what is s, in matrix format? what is the z+ state in matrix format? show that z+ state is an eigenvector of sz. what is the eigenvalue? iii. what is sy in matrix format? iv. what is the y+ state in matrix format? show that y+ state is an eigenvector of sy. what is the eigenvalue? v. show that z+ state is not an eigenvector of sy. vi. show that y+ state is not an eigenvector of sz. b. in the y-basis: i. what is sy in matrix format? ii. what is the y+ state in matrix format? show that y+ state is an eigenvector of sy. what is the eigenvalue? is the y+ state in the y-basis, the same state as the y+ state in the z-basis? explain. iv. is the sy operator in the y-basis, the same state as the sy operator in the z-basis? explain.

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Answer from: Quest

answer would be letter choice (a), a ball resting on a shelf. would be another example of potential energy > stored energy > not moving.

a ball spinning on a finger > kinetic energy > moving energy

a ball rolling on the ground > kinetic energy > moving energy

a ball flying through the air > kinetic energy > moving energy

hope that : )

Answer from: Quest

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.

Answer from: Quest

it is a negative acceleration

Answer from: Quest

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge, $v = \dfrac{e_p}{q}$ then the following gives us the potential difference, $\delta v = v_b - v_a$ $\begin{aligned} \delta v & = \dfrac{e_p_b}{q} - \dfrac{e_p_a}{q} \\ & = \dfrac{\delta e_p}{q} \end{aligned}$ the formula $\delta v = \delta e_p / q$ may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get $\delta e_p = q\delta v$ using q = 8.00 × 10⁻¹⁹ c and δv = 2.00 v, we get $\begin{aligned} \delta e_p & = (8.00\times10^{-19} \text{ c})(2.00\text{ v}) \\ & = 1.60\times 10^{-18}\text{ j} \end{aligned}$ the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.

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Consider the s- operator (the spin operator in the z-direction), and the sy operator (the spin opera...

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