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4 years ago

12

What physical characteristic is the same for a particular substance regardless of the sample size .

1 answer:

jeka944 years ago

4 0

<span>The physical feel of H2O is the same regardless of the sample size of the substance. Water feels wet whether it is a single drop or equivalent in volume to an ocean. It is the way the substance feels no matter how much or how little there is present.</span>

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The number of protons and neutrons in an atom is that atom’s _____________ number.

astraxan [27]

Answer:

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.

Explanation:

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4 years ago

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Which of these nebulae is the odd one out?

Lubov Fominskaja [6]

Answer: The answer is D!

Explanation:

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3 years ago

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Convert 9.83 m/s with a radius of 0.85 m to rotations per minute (rpm)

marissa [1.9K]

Answer: Conversion of 9.83 m/s with a radius of 0.85 m into rotations per minute (rpm) is $99.25 m^{-1}$ .

Explanation:

Given: Speed = 9.83 m/s

Convert m/s into m/minute as follows.

$1 min = 60 sec\\9.83 m/s = 9.83 m/s \times \frac{60 s}{1 min}\\= 529.8 m/min$

Radius = 0.85 m

Now, rotations take place in circular motion. So, the circumference of a circle is $2 \pi r$ .

Therefore, circumference is calculated as follows.

$Circumference = 2 \times pi \times r\\= 2 \times 3.14 \times 0.85 m\\= 5.338 m$

Formula used to calculate rotations per minute (rpm) are as follows.

$rpm = \frac{speed (in meter per minute)}{circumference}\\= \frac{529.8 m/min}{5.338 m}\\= 99.25 m^{-1}$

Thus, we can conclude that conversion of 9.83 m/s with a radius of 0.85 m into rotations per minute (rpm) is $99.25 m^{-1}$ .

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3 years ago

Track and field is an individual sport question 4 options: true false

Oxana [17]

Answer:

Yes

Explanation: The Answer is True not false

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2 years ago

You have learned of two fundamental units that are not vector quantities. Which are they?

Mila [183]

Answer:

Mass and time are not vector quantities .

Explanation:

All the physical quantities can be classified into two major categories that is :

Scalar
Vector

Scalar quantities

They are those that describes only the magnitude and they are regarded as incomplete quantities as they don't provide complete information.

For example : Speed ,Mass, Time etc

Vector quantities

They are complete quantities that can be described in magnitude as well as direction .

For example : Velocity ,gravity ,Acceleration etc

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3 years ago