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Irina18 [472]
2 years ago
12

Which quantity is a scalar quantity?

Physics
1 answer:
kow [346]2 years ago
3 0

Answer:

area is the scalar quantity

Explanation:

Scalar quantity are those which only have magnitude and no direction.

For example: mass, time, distance etc.

Vector quantity are those which have both magnitude and direction.

For example: displacement , velocity etc.

From the given options, the quantity which is scalar is are a because it only has magnitude but no directions.

Where acceleration, velocity, displacement and force all are vector quantities., the correct answer is option B.

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Explanation:

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IMPORTANT 3 QUESTIONS!
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Answer:

7. 20,000,000 mL.

8. 8,000 m.

9. 120,000 secs.

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Explanation:

7. Determination of the volume in millilitres (mL)

Volume in litre (L) = 20,000 L

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The volume in mL can be obtained as follow:

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Therefore,

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8. Determination of the distance in metre (m)

Distance in mile = 5 mile

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First, we shall convert from mile to kilometre.

This can be done as follow:

1 mile = 1.6 km

Therefore,

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Finally, we shall convert 8 km to metre (m).

This is illustrated below:

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Therefore,

8 km = 8 x 1,000 = 8,000 m

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9. Determination of the time in seconds.

Time = 400 minutes for 5 days.

First, we shall convert 400 mins to hour.

This is illustrated below:

60 minutes = 1 hour

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400 mins = 400/60 = 20/3 hours

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Therefore, the time (hours) in 5 days will be = 20/3 x 5 = 100/3 hours.

Next, we shall convert 100/3 hours to minutes.

This is illustrated below:

1 hour = 60 minutes

Therefore,

100/3 hours = 100/3 x 60 = 2000 mins

Finally, we shall convert 2000 mins to seconds.

This is illustrated below:

1 mins = 60 secs

2000 mins = 2000 x 60 = 120,000 secs.

Therefore, the time is 120,000 secs.

10. Determination of the number of significant figures.

To obtain the significant figures of a number, we simply count all the numbers available.

Therefore, the number of significant figures for 9876 is 4.

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