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Viktor [21]
3 years ago
6

When water freezes, the density decreases and the bonds between molecules become stronger. Do you expect the speed of sound to b

e greater in liquid water or in water ice?
Physics
1 answer:
Simora [160]3 years ago
4 0

Answer:

The speed of sound is greater in water ice

Explanation:

This is because water ice is in its solid form and sound travels faster in solids. This is due to its molecules being tightly packed together than in a liquid. The tightly packed molecules help sound collide quickly through it whereas in liquids the molecules aren’t tightly packed compared to a solid and the sound waves takes more time colliding through it.

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Frictional force increases with the increase in the _______________ of the surface.
Sedaia [141]

Answer:

Frictional force increases with the increase in the roughness of the surface.

Explanation:

You will see that the rougher the surface, the greater the wear and tear.

7 0
3 years ago
The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. the helicopter flies for
igomit [66]

Answer:

The helicopter uses 35 gallons to fly for 5 hours.

Explanation:

The amount of gas that a helicopter uses for flying varies directly proportional to the number of hours spent flying.

g ∝ T

where g represents amount of gas and T time of flight.

Then,

\therefore \frac{g_1}{g_2}=\frac{T_1}{T_2}

The helicopter files 4 hours and uses 28 gallons of fuel.

Here, g₁= 28 gallons, T₁=4 hours

g₂=?, T₂=5 hours.

\therefore \frac{g_1}{g_2}=\frac{T_1}{T_2}

\Rightarrow \frac{28}{g_2}=\frac{4}{5}

⇒28×5= g₂×4

⇒ g₂×4=28×5

\Rightarrow g_2=\frac{28\times 5}{4}

\Rightarrow g_2=35 gallons

The helicopter uses 35 gallons to fly for 5 hours.

5 0
3 years ago
The mass of an electron is A) equal to the mass of a proton B) less than the mass of a neutron C) greater than the mass of a pro
julsineya [31]

Answer:

B

Explanation:

Atomic structure contains electrons, protons and neutrons.

Electron is very light compared to proton and neutrons.

Given that the mass of an electron is

A) equal to the mass of a proton

B) less than the mass of a neutron

C) greater than the mass of a proton

D) equal to the mass of a neutron

The correct answer is B which is less than the mass of the neurons.

4 0
3 years ago
es la atmósfera que se percibe en un cuento de acuerdo a la manera de pensar y sentir de los personajes no se ve sólo se siente​
masya89 [10]

Answer:

can you please ask in english

8 0
3 years ago
What is helpful in calculating standard deviation?
Oksana_A [137]
<span>Standard deviation is a calculation. It I used in statistical analysis of a easier job. hoped this helps u </span>
4 0
3 years ago
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