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amid [387]
3 years ago
6

Water at the top of Horseshoe Falls (part of Niagara Falls)

Physics
1 answer:
ale4655 [162]3 years ago
8 0

Answer:

\theta= (-74.42)^{\circ} C

Explanation:

Horizontal speed of water, v_{xf}=9\ m/s

Height, h = -53 (below pool)

We can find firstly the final vertical speed of the water using third equation of kinematics. So

v^2_{yf}=u^2_{yi}+2(-g)h\\\\v^2_{yf}=2\times -9.8\times -53\\\\v_{yf}=32.23\ m/s

Let \theta is the angle where the falling water moving as it enters the  pool. So,

\tan\theta=\dfrac{v_{yf}}{v_{xf}}\\\\=\dfrac{-32.3}{9}\\\\=-74.42^{\circ} C

Hence, the angle is (-74.42)°C.

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Gnesinka [82]

Answer: B. Allegheny plateau

Explanation: Allegheny plateau is a mountainous region that makes up the northern part of the United States of America, the following states are located on the Allegheny plateau New York, Pennsylvania, West Virginia and Ohio, it is made up of HORIZONTAL SEDIMENTARY BEDROCK at elevated lands. Allegheny plateau is over 40million area is over 40million acres,it has been a site for Erosion and for millions years,through this erosions some areas have been brought low while others are higher following the deposition of materials by the erosion.

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3 years ago
When sugar is poured from the box into the sugar bowl, the rubbing of sugar grains creates a static electric charge that repels
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Answer:

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From the question,

since q' = q

Then,

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Substitute into equation 2

F = 9×10⁹(1.79×10⁻¹¹)²/(3.45×10⁻⁵ )²

F = 9×10⁹(3.2041×10⁻²²)/(11.9025×10⁻¹⁰)

F = (28.8369×10⁻¹³)/(11.9025×10⁻¹⁰)

F = 2.6×10⁻³ N.

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