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3 years ago

What happen when we put a waterproof paper in hot water and what happens in cold water?

Chemistry

1 answer:

Ainat [17]3 years ago

6 0

Answer:

When you heat up water, the water molecules start moving around faster and faster. ... So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top, mixing with the cold water along the way and creating purple water.

Explanation:

have a great day :)

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Which two temperatures are equivalent?

S_A_V [24]

Answer:

273 °K annd 0°C are equivalent

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3 years ago

A car at rest ends accelerates for 12 seconds. After this time the car is going 36 m/s. What was its acceleration?

Zigmanuir [339]

Acceleration is defined as velocity per unit time.

$Acceleration=\frac{Velocity}{time}$

$a=\frac{dv}{dt}$

Here, a=acceleartion,

v=velocity=36 m/s

t=time=12 s

$a=\frac{dv}{dt}$

$a=\frac{36}{12}$

$a=3 ms⁻²$

A car at rest ends accelerates for 12 seconds. After this time the car is going 36 m/s. So acceleration that is a=3 ms⁻².

4 0

3 years ago

Read 2 more answers

BrainlieSTTTTTT A gas is originally stored at a pressure of 25 atm with a volume of 3 L. If the pressure were increased to 75 at

Crazy boy [7]

Explanation:

Apply Boyle's Law :-

P1V1 = P2V2

Where P1 is 25 atm
V1 is 3L
P2 is 75 atm
V2 is what we need to find out.

25 × 3 = 75 × V2

$\tt{V_2 = \dfrac{ 25 \times 3}{75}}$

$\tt{V_2 = \dfrac{75}{75}}$

<u>So, the answer is d) Part, 1L .</u>

Hope it helps :)

3 0

3 years ago

Why is a pyramid shape used to represent the energy in an Ecosystem?

Salsk061 [2.6K]

Answer:

An energy pyramid shows the flow of energy at each trophic level in an ecosystem. A pyramid shape is used because energy is lost at each trophic level when organisms use it up.

Explanation:

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3 years ago

Which of the following is most electronegative? P,N,Mg,C,O

Elanso [62]

It's Oxygen.
electronegativity is an arbitrary measure of how much will an electron get attracted to an atom of an element
as we know, oxygen is the best at accepting electrons from this list, so the answer is oxygen

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3 years ago