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jeka94
3 years ago
6

What is the kinetic energy of a ball with a mass of .5 kg and a velocity of 10 m/s

Physics
1 answer:
marshall27 [118]3 years ago
8 0

Answer:

kinetic energy is 1/2mv^2.

which is 1/2×5×10^2.

1/2×5×100=

250J.

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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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2 years ago
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Explanation:

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Which stretch focuses on stretching the glutes and hamstrings while laying on your back?
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knee to chest

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Light travels at 3 × 108 m/s, and it takes about 8 min for light from the sun to travel to Earth. Based on this, the order of ma
N76 [4]

Answer:

The order of magnitude of the distance from the sun to Earth is 10⁸ km.

Explanation:

The order of magnitude of the distance from the sun to Earth can be calculated as follows:

c = \frac{x}{t}

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c: is the speed of light = 3x10⁸ m/s

t: is the time = 8 min

Hence, the distance is:

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Therefore, the order of magnitude of the distance from the sun to Earth is 10⁸ km.

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Answer:

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