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3 years ago

Adding heat to a liquid causes which of the following physical changes?

1 answer:

3 0

The density would decrease because the mass of an object deals with the amount of atoms in the object and since none of the object was reduced "a" wouldn't be the answer. Depending on the amount and period of time that the heat is applied the liquid could change into a gas so "d" wouldn't be correct. Density is the mass÷ volume, and when you add heat to an object it could take up different amounts of space because of its particles gaining energy and spreading apart. So the density would decrease because of the volume increasing. So I believe that "c" is the answer.

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What does Kepler's second law state? A. Planets travel in ellipses. B. Planets sweep equal areas in equal times. C. A planet's a

andrey2020 [161]

Kepler's second law of planetary motion says that the imaginary line
from the Sun to the planet sweeps out equal areas in equal periods
of time.

It's just as true of comets, asteroids, dwarfs, coasting space probes ...
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That's why a comet moves so fast when it gets near the Sun.

4 0

3 years ago

Why doesn't the skater ever regain his potential energy?

lina2011 [118]

Answer:

potential energy is stored energy...basically energy gathered from staying still so because the skater is in motion he has lost the potential energy and turned it into kinetic energy

Explanation:

7 0

3 years ago

PLS HELP!! IN QUIZ RN!

kakasveta [241]

Answer:

D Energy Transformation

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3 years ago

A 0.4 kg soccer ball approaches a player with a velocity of 18 m/s to the east. The player strikes

Zigmanuir [339]

Answer:

16Newton sec

Explanation:

Ft = m( v + u)

= 0.4( 22 + 18)

= 0.4 x 40

= 16newton sec

7 0

3 years ago

Which of the following statements are true and supported by kinetic molecular theory?

Margarita [4]

Answer:

I,II, III are true

Explanation:

1. Yes

low pressure reduces the inter molecular attraction force and cause non-ideality

at high temperature frequency of collision is increase that causes loss of energy.

2. yes

$v_{rms}=\sqrt{\frac{2RT}{M} }$

T is temperature , more the T more will be the velocity of molecules and hence more kinetic energy.

3. Yes

Polar gases contain stronger inter molecular forces from reliable, measurable partial charges, which implies that they are more permanent, long-lasting, and therefore more prominent forces.

4. No

higher the temperature higher will be the pressure as the frequency of collision will increase and thus increasing the pressure.

6 0

3 years ago