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zhenek [66]
3 years ago
5

Which statement best describes Gay-Lussac’s law?

Physics
2 answers:
gtnhenbr [62]3 years ago
6 0
The answer is D. Pressure is directly proportional to temp
prohojiy [21]3 years ago
6 0
D. lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll
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Until he was in his seventies, Henri LaMothe excited audiences by belly-flopping from a height of 9 m into 32 cm. of water. Assu
baherus [9]

Answer:

823.46 kgm/s

Explanation:

At 9 m above the water before he jumps, Henri LaMothe has a potential energy change, mgh which equals his kinetic energy 1/2mv² just as he reaches the surface of the water.

So, mgh = 1/2mv²

From here, his velocity just as he reaches the surface of the water is

v = √2gh

h = 9 m and g = 9.8 m/s²

v = √(2 × 9 × 9.8) m/s

v = √176.4 m/s

v₁ = 13.28 m/s

So his velocity just as he reaches the surface of the water is 13.28 m/s.

Now he dives into 32 cm = 0.32 m of water and stops so his final velocity v₂ = 0.

So, if we take the upward direction as positive, his initial momentum at the surface of the water is p₁ = -mv₁. His final momentum is p₂ = mv₂.

His momentum change or impulse, J = p₂ - p₁ = mv₂ - (-mv₁) = mv₂ + mv₁. Since m = Henri LaMothe's mass = 62 kg,

J = (62 × 0 + 62 × 13.28) kgm/s = 0 +  823.46 kgm/s = 823.46 kgm/s

So the magnitude of the impulse J of the water on him is 823.46 kgm/s

6 0
3 years ago
Two automobiles of equal mass approach an intersection. One vehicle is traveling with speed 13.0 m/s toward the east, and the ot
puteri [66]

Answer:

Explanation:

We shall apply law of conservation of momentum to know the Speed of northward moving vehicle before collision to check the veracity of driver's statement .

Let v be the velocity of composite mass after collision

Applying law of conservation of momentum in north direction

m v₂ = 2m v sin55.08

Applying law of conservation of momentum in east  direction

m x 13 = 2m v cos55.08

Dividing these two equations

v₂ / 13 = tan55.08

v₂ = 13  tan55.08

= 18.62 m/s

= (18.62 x60 x 60) / 1000

= 67 km/h

= 67 x 5/8 mi/h

= 42 mi/h

So he is lieing.

7 0
4 years ago
Please help.
Alex787 [66]

Explanation:

<em>math</em><em>ematically</em><em>,</em>

<em>kinetic \: energy \:  =  \frac{1}{2} m {v}^{2}</em>

<em>wher</em><em>e</em><em> </em><em>m</em><em>=</em><em> </em><em>mass</em>

<em>and</em><em> </em><em>v</em><em>=</em><em>veloc</em><em>ity</em>

<em>giv</em><em>en</em><em> </em><em>that</em><em>,</em><em> </em>

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<em>mass</em><em> </em><em>=</em><em>5</em><em>0</em><em>4</em><em>0</em><em>k</em><em>g</em>

<em>maki</em><em>ng</em><em> </em><em>velo</em><em>city</em><em> </em><em>the</em><em> </em><em>su</em><em>bject</em>

<em>v =  \sqrt{ \frac{2 \times kinetic \: energy}{mass} }</em>

<em>sub</em><em>stitute</em><em> </em><em>the</em><em>ir</em><em> </em><em>valu</em><em>es</em><em> </em><em>in</em><em> </em><em>the</em><em> </em><em>formu</em><em>la</em>

<em>v =  \sqrt{ \frac{2 \times 493900}{5040} }</em>

<em>v =  \sqrt{ \frac{987800}{5040} }</em>

<em>v =  \sqrt{196}</em>

<em>v = 14m {s}^{ - 1}</em>

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3 years ago
Which of these is true about a magnetic field?
dimulka [17.4K]
The answer is <span>It points in the same direction as it would make a compass point.  In a magnetic field, t</span>he direction of the magnetic field at any location is described as the direction in which the north pole of a compass needle points at that location.
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4 years ago
Force
dezoksy [38]

Answer:

Answer is a force liquid that cannot be compresed

on edgenuity

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