2 years ago

Can something change states of matter how do you know

1 answer:

4 0

Yes, it can change states of matter from heat. Like ice, ice changes it’s state of matter from the temperature it is in, which causes it to turn into a liquid.(another form of matter) Again with heat, if water is boiled to a certain temperature it converts to a gas. Now with cold. If water is at such a coke temperature it will turn to ice, a form of matter. Now when a gas is cooled down, the atoms comprising the gas have less energy to move around.

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Which statement about van der Waals forces is true?

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The answer is A. When the forces are weaker, they will not be able to hold the particles of the substances together; therefore, the substance will be observed as being volatile.

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3 years ago

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Little Tammy lines up to tackle Jackson to (unsuccessfully) prove the law of conservation of momentum. Tammy’s mass is 34.0 kg a

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Answer:

So Tammy must move with speed 4.76 m/s in opposite direction of Jackson

Explanation:

As per law of conservation of momentum we know that there is no external force on it

So here we can say that initial momentum of the system must be equal to the final momentum of the system

now we have

$m_1v_1 + m_2v_2 = 0$

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3 years ago

8. A driver starts his parked car and within 12 hours reaches a speed of 75km/h, as he travels

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56mph

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2 years ago

True or false. A convection current is the circular motion of a fluid caused by the rising of heated fluid

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True that is what a convection current is

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2 years ago

State one way to decrease the moment of a given force about a given axis of rotation.

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The moment of a given force about a given axis of rotation can be decreased by decreasing the perpendicular distance of force from the axis of rotation.

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