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3 years ago

What is the effect of pressure on boiling and melting substance?

Physics

2 answers:

AleksandrR [38]3 years ago

7 0

Explanation:

rakuw not typed he copied from go ogle. the real answer is

Increasing pressure usually increases the boiling point of a liquid. A way to think about it is that the molecules of the liquid need more energy to break into the gas phase when the more molecules are hitting the surface of the liquid with more energy. For melting point, increasing the pressure makes some difference.

Nadya [2.5K]3 years ago

5 0

Answer:

The boiling point of liquids always increases when pressure is applied on a liquid. This is because the molecules of a liquid will need more energy to turn into a gaseous state when pressure is applied on that substance.

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In an experiment, a rectangular block with height h is allowed to float in two separate liquids. In the first liquid, which is w

Amiraneli [1.4K]

Answer:

The relative density of the second liquid is 7.

Explanation:

From archimede's principle we know that the force that a liquid exerts on a object equals to the weight of the liquid that the object displaces.

Let us assume that the volume of the object is 'V'

Thus for the liquid in which the block is completely submerged

The buoyant force should be equal to weight of liquid

Mathematically

$F_{buoyant}=Weight\\\\\rho _{1}\times V\times g=m\times g\\\\\therefore \rho _{1}=\frac{m}{V}...............(i)$

Thus for the liquid in which the block is 1/7 submerged

The buoyant force should be equal to weight of liquid

Mathematically

$F'_{buoyant}=Weight\\\\\rho _{2}\times \frac{V}{7}\times g=m\times g\\\\\therefore \rho _{2}=\frac{7m}{V}.................(ii)$

Comparing equation 'i' and 'ii' we see that

$\rho_{2}=7\times \rho _{1}$

Since the first liquid is water thus $\rho _{1}=1gm/cm^3$

Thus the relative density of the second liquid is 7.

6 0

3 years ago

Read 2 more answers

One property that makes electromagnetic waves differ from other types of waves is that they can

Flauer [41]

travel through a vacuum at the speed of light. Other waves need a medium; sound waves need molecules that vibrate.

5 0

3 years ago

A ball is thrown vertically upward with a speed of 18.0 m/s. (a) How high does it rise? (b) How long does it take to reach its h

Mrrafil [7]

Answer:

a) $y=16.53m$

b) $t_{up}=1.83s$

c) $t_{down}=1.84s$

d) $v=-18m/s$

Explanation:

a) To find the highest point of the ball we need to know that at that point the ball stops going up and its velocity become 0

$v^{2} =v^{2} _{o} +2g(y-y_{o})$

$0=(18)^{2} -2(9.8)(y-0)$

Solving for y

$y=\frac{(18)^{2} }{2(9.8)}=16.53m$

b) To find how long does it take to reach that point:

$v=v_{o}+at$

$0=18-9.8t$

Solving for t

$t_{up} =\frac{18m/s}{9.8m/s^{2} }= 1.83s$

c) To find how long does it take to hit the ground after it reaches its highest point we need to find how long does it take to do the whole motion and then subtract the time that takes to go up

$y=y_{o}+v_{o}t+\frac{1}{2}gt^{2}$

$0=0+18t-\frac{1}{2}(9.8)t^{2}$

Solving for t

$t=0 s$ or $t=3.67s$

Since time can not be negative, we choose the second option

$t_{down}=t-t_{up}=3.67s-1.83s=1.84s$

d) To find the velocity when it returns to the level from which it started we need to use the following formula:

$v=v_{o}+at$

$v=18m/s-(9.8m/s^{2} )(3.67s)=-18m/s$

The sign means the ball is going down

8 0

4 years ago

The lower an electromagnetic wave's wavelength is, the _____________ its frequency is.

nika2105 [10]

Higher frequency for lower wavelength...
.... If speed is fixed. ie no medium change.

3 0

3 years ago

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Advances in genetic engineering show that it is possible to:_____________. 1. enhance learning and memory ability in nonhuman or

san4es73 [151]

Answer:

1. enhance learning and memory ability in nonhuman organisms.

Explanation:

Genetic engineering can be defined as the process by which scientists modify the genome of an organism using new molecular tools. The resulting organism after the modification is known as Genetically Modified Organisms (GMO).

To create this genetically modified organisms requires recombinant DNA.

Advances in genetic engineering show that it is possible to enhance learning and memory ability in nonhuman organisms through biotechnology.

3 0

4 years ago

What is the effect of pressure on boiling and melting substance?​

What is the effect of pressure on boiling and melting substance?