Density is mass per unit of volume, usually measured in g/cm³. So first determine the volume of the cylinder:
<em>v</em> = <em>π</em> <em>r </em>² <em>h</em> = <em>π</em> ((39.0 mm) / 2)² (39.0 mm)
<em>v</em> = 59,319/4 <em>π</em> mm³ ≈ 46,589 mm³ ≈ 46.589 cm³
Then the density is
<em>ρ</em> = <em>m</em> / <em>v</em>
<em>ρ</em> = (1 kg) / <em>v</em> = (1000 g) / <em>v</em>
<em>ρ</em> ≈ 21.464 g/cm³
Or, if you want to preserve the given units, that's
<em>ρ</em> ≈ 0.00002146 kg/mm³
The kinetic energy of an object is directly proportional to its mass and the square of its velocity
KE = 1/2 (mv²)
KE = Kinetic Energy
m = mass in kg
v = velocity in m/s
Given:
m = .8 kg
v = 11.2 m/s
Substitute:
KE = 1/2 (.8)(11.2²)
KE = 50.18 J
Were the pool to be one of water, then sound would travel faster than in the air of a bedroom
(A) The oxygen atom becomes strongly negative.
Explanation:
When a very electronegative atom like oxygen bonds to an atom with a lower electronegativity, like lithium, the oxygen atom becomes strongly negative and the lithium becomes strongly positive.
The attraction between these oppositely charged ions results in the formation ionic bond.
- An ionic bond is an interatomic bond in which a highly electronegative atom is bonded to less electronegative one.
- The electronegative nature of the oxgyen allows is to gain the electrons lost by weakly electronegative lthium.
- Most metals have low electronegativity.
- They then both will form ions.
- The attraction between the oppositely charged ions results in an ionic/electrovalent bonding.
learn more:
Ionic bond brainly.com/question/6071838
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I think it might be a or d i hope i have helped :)
