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3 years ago

When water change into ice it contracts or expand plz answer fast..

Physics

2 answers:

Serga [27]3 years ago

5 0

Yes water does expand when changing from a liquid to a solid (water to ice)

mihalych1998 [28]3 years ago

4 0

Answer:Yes, water indeed expands when it changes form from liquid to solid. And this is because water has a property called “hydrogen bonds”, and these bonds occur between each water molecule. But when water is in a liquid form these hydrogen bonds break more easily and occur less frequently. When the temperature drops the kinetic energy also drops, which in turn makes hydrogen bonds form more frequently. So the water molecules form a lattice, which is less dense than regular liquid water.

Explanation:

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A railroad car of mass M moving at a speed v1 collides and couples with two coupled railroad cars, each of the same mass M and m

Tatiana [17]

Answer:

Explanation:

Given

mass of each railroad is M

first railroad is moving with velocity $v_1$ and other two's with $v_2$

conserving Momentum

$Mv_1+2Mv_2=3M v_f$

where v_f is the final velocity of combined system

$v_f=\frac{v_1+2v_2}{3}$

(b)Initial Kinetic Energy

$=\frac{1}{2}Mv_1^2+\frac{1}{2}2Mv_2^2$

$=\frac{1}{2}Mv_1^2+Mv_2^2$

Final Kinetic Energy

$=\frac{1}{2}3Mv_f^2=\frac{1}{6}M(v_1^2+4v_2^{2}+4v_{1}v_2)$

Loss in Kinetic Energy

$=\frac{1}{2}Mv_1^2+Mv_2^2-\frac{1}{6}M(v_1^2+4v_2^{2}+4v_{1}v_2)$

$=M(v_1-v_2^2)^2$

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4 years ago

Does spearmint gum have alcohol in it

Andreyy89

Yes it has sugar alcohol

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3 years ago

AgNO3(aq)+NaCl(aq)—>|NaN03(aq)+AgCl(s)

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3 years ago

Carbon and hydrogen are examples of pure substances or

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4 years ago

Read 2 more answers

What is the external-internal pressure difference when the diver's lungs are at a depth of 6.1m (about 20ft)? assume that the di

Nesterboy [21]

Snorkel connects the diver's lungs with the air above the water. Because of this, the pressure inside the diver's lungs is the same as the atmospheric pressure.
The static pressure of a fluid is given with this equation:
$P=\rho gh$
The density of water is 1000kg/m^3.
$P=1000\cdot 9.81 \cdot 6.1=59841$Pa$
Standart atmospheric pressure is 101<span>325Pa.
</span>The difference is:
$\Delta P=101325-59841=41484 $Pa$

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3 years ago