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Readme [11.4K]
3 years ago
11

Rank these graphs on the basis of the angular acceleration of the object. Rank positive angular accelerations as larger than neg

ative angular accelerations
Physics
1 answer:
Gemiola [76]3 years ago
3 0

As soon as I saw the beginning of the question, I knew that
when I opened it and read the rest, there would be no graphs
to rank.  I was not disappointed.


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A gamma-ray photon produces an electron and a positron, each with a kinetic energy of 261 keV . h=6.626×10−34J⋅s, c=2.998×108m/s
ddd [48]

Answer:

The energy and the wavelength of the photon are 1.546 MeV and 8.036\times10^{-13}\ m.

Explanation:

Given that,

Kinetic energy = 261 KeV

Planck's constant h = 6.626\times10^{−34}\ J.s

Speed of light c=2.998\times10^{8}\ m/s

Mass of electron m_{e}=9.109\times10^{-31}\ kg

Charge q=1.602\times10^{-19}\ C

(A). We need to calculate the energy of the photon

Using formula of rest mass energy

E=m_{0}c^2

E=9.109\times10^{-31}\times(3\times10^{8})^2

E=8.198\times10^{-14}\ J

Energy in eV

E=\dfrac{8.198\times10^{-14}}{1.6\times10^{-19}}

E=512375\ eV

E=0.512\ MeV

The total energy of photon

TE=2(E+K.E)

TE=2(0.512+0.261)

TE=1.546\ MeV

(B). We need to calculate the wavelength of the photon

Using formula of wavelength

\lambda=\dfrac{hc}{E}

Put the value into the formula

\lambda=\dfrac{6.626\times10^{−34}\times3\times10^{8}}{1.546\times10^{6}\times1.6\times10^{-19}}

\lambda=8.036\times10^{-13}\ m

Hence, The energy and the wavelength of the photon are 1.546 MeV and 8.036\times10^{-13}\ m.

7 0
3 years ago
1. Where are stars formed?
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\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}

C. A nebula.

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3 0
3 years ago
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Planet Geos in orbit a distance of 1 A.U. (astronomical unit) from the star Astra has an orbital period of 1 "year." If planet Logos is 4 A.U. from Astra, how long does Logos require for a complete orbit?

TB = <span>8</span> years

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What are some other examples of scientific knowledge that must have resulted from indirect evidence?
n200080 [17]

Answer:

The atomic model, the structure of the solar system, and the theory of black holes are examples of models created using indirect evidence.

Explanation:

I have no explanation sorry.

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Which statement describes the horizontal acceleration of a projectile? It is –9.8 m/s2. It is 9.8 m/s2. It is constant. It is ze
lina2011 [118]
In a projectile, the horizontal acceleration is zero. The velocity remains constant at all times. However, the <u>vertical acceleration</u> is -9.81m/s^2.

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