2 years ago

Two cars approach each other. How does the

Physics

1 answer:

Lemur [1.5K]2 years ago

7 0

Answer:

<u>The car's fast. The ground isn't moving.</u>

Hope this helped! :D

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3.0E-17 joules divided by 1.0E -27 kgm/s equals?

insens350 [35]

Here we have two physical quantities which we have to divide

$P_1 = 3.0 \times 10^{-17} J$

other is

$P_2 = 1.0 \times 10^{-27} kg m/s$

now we need to find its division

$\frac{P_1}{P_2} = \frac{3.0\times 10^{-17}}{1.0\times 10^{-27}}$

now we have

$\frac{P_1}{P_2} = 3.0\times 10^{10} Js/kgm$

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3 years ago

When an electron falls from a higher to a lower energy level in an atom, the photon released has a wavelength of 121.6 nm. What

yarga [219]

Answer:

$\Delta E=1.64*10^{-18}J$

Explanation:

The energy difference between the energy levels involved in the transition of the electron is directly proportional to the frequency of the emitted photon:

$\Delta E=h\nu(1)$

Where h is the Planck constant. The photon's frequency is inversely proportional to its wavelegth:

$\nu=\frac{c}{\lambda}(2)$

Here c is the speed of light. Replacing (2) in (1):

$\Delta E=\frac{hc}{\lambda}\\\Delta E=\frac{(6.63*10^{-34}J\cdot s)(3*10^8\frac{m}{s})}{121.6*10^{-9}m}\\\Delta E=1.64*10^{-18}J$

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3 years ago

Which type of heat transfer can happen even if there are no particles of matter? A. Conduction B. Radiation C. Convection D. Ins

Naddik [55]

Heat can travel as<em> radiation</em>, even if there are no particles of matter
along the way. Which is really lucky, because that's how we get
heat from the sun. And light too.

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3 years ago

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B they formed from the dense elements as compared to the others in the solar system

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3 years ago

In any system, the _____ in the system remains constant, while the PE or KE may change.

vladimir1956 [14]

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The sum of PE and KE remains constant