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r-ruslan [8.4K]
3 years ago
6

Room temperature water is placed in an Erlenmyer flask and heated to the boiling point. After the flask is removed from the heat

source boiling ceases. Then a rubber stopper is placed in the mouth of the Erlenmyer flask to seal it from outside air. The flask is then placed in an ice bath. After a few moments the water begins to boil again. What phenomenon causes the water to boil again?
Physics
1 answer:
Vaselesa [24]3 years ago
7 0

Explanation:

When water is boiled in the flask . Some portion of it is evaporated out . Now when cork is placed on it and is placed in the ice box . It cools down , by which the pressure inside decreases .

Due to decrease of pressure , the boiling point of water also decreases . Now it can boil at lower temperature . Thus it starts boiling at lower temperature even , when placed in the ice box .

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Answer:E. Hydrogen was able to participate in an exergonic reaction and carbon dioxide couldn't

Explanation:

An exergonic reaction releases energy to the environment. The combustion of hydrogen contained in the balloon is a chemical reaction. The reaction can take place because hydrogen combines with oxygen in air, that is, the gas is combustible. CO2 does not support combustion, it does not combine with oxygen in air and it is also denser than air, hence does not participate in the exergonic reaction.

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What is the magnitude of the electric field strength between them, if the potential 7.95 cm from the zero volt plate (and 2.05 c
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Answer:

ΔVab = Ed

ΔVab = Va-Vb = Va-V0 = Va

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   = 413V / 0.0795 m

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Explanation:

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3 years ago
Which style of painting is the Peale family known for?
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The correct answer is option B, representational

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Charles Willson Peale , the head of the Peale family was known for painting sixty portraits of the first American president, George Washington. He also painted portraits of portraits of notable people of the society such as  Benjamin Franklin,  Thomas Jefferson etc.  

Most of the paintings of peale family were based on the theme of family, art and science. Six of Peale’s son were known for their renaissance paintings. His oldest son Raphelle was known for still life paintings.  

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8 0
3 years ago
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6.If a 250. gram cart moving to the right with a velocity of .31 m/s collides inelastically with a 500. gram cart traveling to t
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Answer:

The total momentum of the system before the collision is 0.0325 kg-m/s due east direction.    

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Given that,

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Initial velocity of the another cart u' = -0.22 m/s (due left)

Let p is the total momentum of the system before the collision. It is given by :

p=mu+m'u'\\\\p=0.25\times 0.31+0.5\times (-0.22)\\\\p=-0.0325\ kg-m/s

So, the total momentum of the system before the collision is 0.0325 kg-m/s due east direction.            

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