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slavikrds [6]
3 years ago
5

Complete this sentence. If mass remains the same while the volume of a substance ________, the density of the substance will____

___________. decreases, increase increases, increase increases, stay the same decreases, stay the same
Chemistry
2 answers:
zhannawk [14.2K]3 years ago
5 0
The answer would be A
Andre45 [30]3 years ago
4 0
<span> If mass remains the same while the volume of a substance increases, the density of the substance will decrease. The increase in the volume is called expansion, while the decrease in the volume is called contraction.
</span><span>The density measures how much matter (mass) there is in a given amount of space (volume).  So, if the mass stays the same and the volume increases then there is the same amount of mass ad before but in bigger volume so the density is decreased. </span>
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The time needed by the bike to reach the final velocity is 3 .75 seconds ,Option C is the write answer.

<h3>What is Velocity ?</h3>

It is defined as the distance covered by an object in a given amount of time. It is a vector quantity , its unit is m/s , km/hr etc.

It is given in the question that

Initial Velocity = 20m/s

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The equation of motion

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35 = 20 + 4 * t

15 = 4* t

t = 3.75 seconds

Therefore the time needed by the bike  to reach the final velocity is 3 .75 seconds.

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He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.

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The ray is travel in straight line.

The cathode ray is independent of composition of cathode.

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Hence it was consist of negatively charged particles.

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