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7nadin3 [17]
4 years ago
11

What is surface tension of water? Please help!

Physics
1 answer:
kondaur [170]4 years ago
5 0
Surface tension could be defined as the property of the surface of a liquid that allows it to resist an external force. The cohesive forces among liquid molecules are responsible for the phenomenon.

In simpler terms, it is the force that causes the molecules on the surface of a liquid to be pushed together and form a layer. The surface tension, then, is a measure of the cohesive forces that hold the molecules together.

Getting the actual measurement would give us 72 dynes/cm at 25°C . However, the force decreases significantly depending on the temperature.
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An object in motion will remain in motion and an object at rest will remain at rest until a greater force interrupts it. Explain
Fittoniya [83]

Answer:

A object, lets say a cup. This cup will never, ever move unless something or someone disturbs it. If something touches or hits this cup the cup will move. But, until the cup gets touched, nothing will EVER make it move.

Explanation:

<em>I hope this helps!!</em>

4 0
3 years ago
A scuba diver, submerged under water looks up and seessunlight
maw [93]

Answer:

41.7975\ ^{\circ}

Explanation:

n_2 = Refraction index of water = 1.333

n_1 = Refraction index of air = 1

\theta_2 = Angle of sunlight = 30°

From Snell's law we have

\dfrac{n_1}{n_2}=\dfrac{sin\theta_2}{sin\theta_1}\\\Rightarrow \theta_1=sin^{-1}\dfrac{n_2sin\theta_2}{n_1}\\\Rightarrow \theta_1=sin^{-1}\dfrac{1.333sin30}{1}\\\Rightarrow \theta_1=41.7975\ ^{\circ}

The angle measured from the vertical does the sunlight strike thesurface of the water is 41.7975\ ^{\circ}

5 0
3 years ago
Four metals were kept in contact with each other. The table below shows the initial temperature of the metals.
disa [49]

Answer:

metal B

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5 0
2 years ago
What types of surfaces create the greatest frictional force?
Vlad [161]
Cemente and Rope are two of them hope this help please mark me as brainliest.
7 0
4 years ago
PLZ HELP!!!!
irinina [24]
<span>First blank: B) Cutting down trees instead of growing trees
Cutting down trees means less plants that are photosynthesizing and consuming CO2 from the atmosphere.

Second blank: </span><span>D) Using clean energy sources instead of fossil fuels
Clean energy sources have little to no CO2 emissions. On the other hand, fossil fuels, when burned/combusted release large amounts of CO2 into the atmosphere.</span>
4 0
4 years ago
Read 2 more answers
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