All categories

3 years ago

Explain why surface tension occurs

1 answer:

5 0

Hey there! The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface do not have other like molecules on all sides of them and consequently they cohere more strongly to those directly associated with them on the surface. Hope this helps! :)

You might be interested in

When electrons are shared, the type of bonding is called _____.

lutik1710 [3]

It's called covelant bonding

5 0

3 years ago

Where can protozoa be found?

Semenov [28]

Protozoa live in seas, rivers, lakes, ponds, decaying matters and soil

8 0

4 years ago

Read 2 more answers

Please help me with my physics! Provide work please. Question #5

Murljashka [212]

#4 is correct.
For #5, don't get all tangled up. Just close your eyes, breathe deeply, and murmur "F equals M A. Force equals mass times acceleration."

The force is 15N. The mass is 12kg. You really shouldn't have any trouble calculating the acceleration.

6 0

4 years ago

A current of 0.86 a flows through a copper wire 0.47 mm in diameter when it is connected to a potential difference of 15 v. how

likoan [24]

To calculate the length of the wire, we use formulas,

$R = \frac{V}{I}$ (A)

$R= \rho \frac{l}{A}$ (B)

Here, R is the resistance of the wire, I is the current flows through wire and V is potential difference. A is cross sectional area of wire and $\rho$ is the density of copper wire and is value, $\rho = 1.7\times 10^{-8} \Omega m$ .

Given $I = 0.86 A,V=15 V and r = \frac{0.47 mm}{2} =2.35 \times 10^{-4} m, V= 15 V.$

Substituting the values of I and V in equation (A ) we get,

$R=\frac{15V}{0.86A} = 17.44 \Omega$

Now from equation (B),

$l=\frac{R A}{\rho }$

Therefore,

$l= \frac{17.44\times\pi \times r^2 }{1.7\times 10^{8} \Omega m} \\\\ l= \frac{17.44\times 3.14 \times(2.35\times10^{-4}m)^2 }{1.7\times 10^{-8} \Omega m} = 177.9 m$

Thus the length of the copper wire is 177.9 m.

8 0

3 years ago

How is sound different from wind?

Mashutka [201]

Answer:

Wind - the perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction. Sound wave - a wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.

Sound wave travels faster in the air when it is with the wind. ... In contrast, when sound wave travels against the wind, that is, when it travels in the opposite direction with the wind, the speed of sound will be reduced by the wind speed, resulting in a lower speed in the upper region.

Explanation:

please mark me brainliest

3 0

3 years ago