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katrin2010 [14]
3 years ago
9

How is the density of a substance calculated?

Physics
1 answer:
den301095 [7]3 years ago
3 0
1).  Take a sample of the substance.  The sample should be the largest
possible that will allow it to be be easily handled and the following steps
to be performed with it. 
(The density doesn't depend on the size of the sample, and every sample
of the same substance has the same density.  But using a larger sample
can improve the accuracy of the measurements you make, and therefore
improve the accuracy of the density you derive for the substance.)

2). Ask or measure the mass of the sample.

3). Ask or measure the volume of the sample.

4). Divide the mass by the volume. Their quotient is the density
of the substance.
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A dentist’s drill starts from rest. After 4.28 s of constant angular acceleration it turns at a rate of 28940 rev/min. Find the
mylen [45]

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Angular acceleration, is 708.07\ rad/s^2

Explanation:

Given that,

Initial speed of the drill, \omega_i=0

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We need to find the drill’s angular acceleration. It is given by the rate of change of angular velocity.

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3 years ago
A boy weighs 400N. what is his mass?
Basile [38]

≈40.8kg


this is to take up space


m

=

W

g


=

400

N

9.8

m/s

2


≈

40.8

kg

m

=

W

g


=

400

N

9.8

m/s

2


≈

40.8

kg

m

=

W

g


=

400

N

9.8

m/s

2


≈

40.8

kg

m

=

W

g


=

400

N

9.8

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2


≈

40.8

kg

m

=

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=

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9.8

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2


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40.8

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m

=

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=

400

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9.8

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2


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=

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9.8

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=

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9.8

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40.8

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=

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9.8

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2


≈

40.8

kg

m

=

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=

400

N

9.8

m/s

2


≈

40.8

kg

4 0
3 years ago
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What aspect of speech sound is the primary factor in determining if one perceives the /ba/ sound or the /pa/ sound?
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3 0
2 years ago
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