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k0ka [10]
3 years ago
15

When neither air mass displaces the adjacent one, their boundary is called a(n) ________ front?

Physics
1 answer:
STALIN [3.7K]3 years ago
5 0
It is a stationary front.
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C.reproducing is think and if wrong I'm so very sorry
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What is the best description for the volume of air volume of air provided in a high quality rescue breath?

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If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter incr
arlik [135]

<u>In modern physics</u>, as it was called "Stefan-Boltzmann law", the total energy radiated per unit surface area of a black body is directly proportional to the fourth power of the black body's temperature T

as:

P\alpha T^4

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then we can make a ratio between the state of before quadruple (with subscript 1) and after (with subscript 2) as:

\frac{P_{1} }{P_{2} } =\frac{T_{1}^4 }{T_{2}^4}

As

T_{2}=4T_{1}

Then

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then

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  • The factor will the total energy radiated per second per square meter increase = 256
5 0
3 years ago
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mr_godi [17]

Explanation:

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Initial speed of the ball, u = 14.5 m/s

Final speed of the ball, v = 11.5 m/s

After crashing through the pane of a second-floor window, the ball shatters the glass as it passes through, and leaves the window at 11.5 m/s with no change of direction. So, the direction of the impulse that the glass imparts to the baseball is in opposite direction to the direction of the balls path.

The change in momentum of the ball is called impulse. It is given by :

J=m(v-u)\\\\J=0.148\times (11.5-14.5) \\\\J=-0.444\ kg-m/s\\\\|J|=0.444\ kg-m/s

Hence, this is the required solution.

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3 years ago
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