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Firdavs [7]
3 years ago
14

Which of the following can best be described as speed plus direction?A: AccelerationB: DecelerationC: FrictionD: Velocity

Chemistry
1 answer:
KATRIN_1 [288]3 years ago
3 0

Answer:

D

Explanation:

Because speed is a scalar quantity which he has only magnitude and no direction while velocity is a vector quantity because it has both magnitude and direction.

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By pushing backwards a roller skater moves forward. This is an example of Newton's
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Which of these describes something a civil engineer would design?
pishuonlain [190]

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<em>The correct option is B) a bridge to connect two landmasses over a stretch of water.</em>

Explanation:

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3 years ago
Which of the following statements best describes why a solution of 6.00 g of Ca(NO3)2?in 30.0 g of water has a greater boiling-p
sukhopar [10]
Boiling-point elevation is a colligative property.

That means, the the boiling-point elevation depends on the molar content (fraction) of solute.

The dependency is ΔTb = Kb*m

Where ΔTb is the elevation in the boiling point, kb is the boiling constant, and m is the molality.

A solution of 6.00 g of Ca(NO3) in 30.0 g of water has 4 times the molal concentration of a solution of 3.00 g of Ca(NO3)2 in 60.0 g of water.:

(6.00g/molar mass) / 0.030kg = 200 /molar mass
(3.00g/molar mass) / 0.060kg =   50/molar mass

=> 200 / 50 = 4.

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