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Zarrin [17]
2 years ago
5

Density is ____ per unit volume.

Physics
2 answers:
mixas84 [53]2 years ago
8 0

Answer:

mass

Explanation:

The density of a substance is defined as the ratio of mass of the substance to the volume of the substance.

It is a scalar quantity.

Density = \frac{mass}{volume}

Its SI unit is kg/m^3.

By comparing the densities we get the idea about how dense the substance is.

For example, cotton and iron, the density of cotton is much less than iron so the cotton is less dense than iron.

The relative density is defined as the ratio of density of substance to the density of water at 4 degree C.

The density of water is maximum at 4 degree C.  

Pavlova-9 [17]2 years ago
3 0
Density is mass per unit volume

remember
p= m/v where v is vol, m is mass and p is density
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Wagon wheel. While working on your latest novel about settlers crossing the Great Plains in a wagon train, you get into an argum
OverLord2011 [107]

Answer:

I = 16.7kgm²

Explanation:

Since, Torque is given by,

\tau = F*r = I*\alpha

here, I = Moment of inertia = ??

\alpha = angular acceleration of wheel = a/r

F = tangential tension acting on the wheel = T

a = acceleration of bag of sand = 2.95 m/s^2

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from force balance on sand bag,

mg - T = m*a

T = m*(g-a)

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So, I = T*r/\alpha = m*(g-a)*r/(a/r)

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I = 20*(9.81 - 2.95)*0.60/(2.95/0.60) = 16.74

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