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padilas [110]
3 years ago
11

What effect does a surfactant have on the surface tension of water

Physics
1 answer:
SpyIntel [72]3 years ago
6 0

Answer:

It weakens its hydrogen bonds causing it to spread out over a surface.

Explanation:

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A boy weighs 40 kilograms. He runs at a velocity of 4 meters per second north. Which is his momentum?
Bogdan [553]
The boy's momentum is 160 kg*m/s north.

The formula of momentum is p = mv, where p is momentum.
p = 40 kg * 4m/s north
p =160 kg*m/s north

<span>Thank you for posting your question. I hope you found what you were after. Please feel free to ask me more.</span>


4 0
3 years ago
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What is the source of Earth’s magnetic field?
zhuklara [117]

Answer and Explanation:

The main source of earth magnetic field is the metals and iron present in earth crust these metals are mainly found in liquid state in earth crust and we know that whenever there is spinning of these liquid metals then there will magnetic field generate, So the main source of earth magnetic field is the metals present in earth crust.

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3 years ago
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Two groups of students were tested to compare their speed working math problems,Each group was given the same problems.One group
Zanzabum
Your hypothesis can be that the group with calculators would finish faster than the group without calculators.
4 0
3 years ago
The length of a certain wire is kept same while its radius is doubled. what is the new resistivity of this wire?
anastassius [24]
The text does not specify whether the resistance R of the wire must be kept the same or not: here I assume R must be kept the same.

The relationship between the resistance and the resistivity of a wire is
\rho =  \frac{AR}{L}
where
\rho is the resistivity
A is the cross-sectional area
R is the resistance
L is the wire length

the cross-sectional area is given by
A=\pi r^2
where r is the radius of the wire. Substituting in the previous equation ,we find
\rho =  \frac{\pi r^2 R}{L}

For the new wire, the length L is kept the same (L'=L) while the radius is doubled (r'=2r), so the new resistivity is
\rho' =  \frac{\pi r'^2 R}{L'}= \frac{\pi (2r)^2 R}{L}=4  \frac{\pi r^2 R}{L}   = 4 \rho
Therefore, the new resistivity must be 4 times the original one.
5 0
3 years ago
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Why is it not posible to see the other waves on the electromagnetic spectrum???
Montano1993 [528]
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portion of the spectrum, which is visible light. 
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3 years ago
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