The two cars illuminated by sodium lamps appear black because the red and black colours are absorbed and no colour is reflected.
<h3>What is reflection of light?</h3>
Reflection of light is the ability of light rays to bounce back off a surface when they are incident on that surface
The ability of light to be reflected gives rise to changes in the colour of objects
When light is incident on a surface, the colour that is reflected gives the colour of that object.
Therefore, when two cars of red and black colur are illuminated by sodium lamps, they appear black because the red and black colours are absorbed and no colour is reflected.
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Answer:
Resistivity, electrical resistance of a conductor of unit cross-sectional area and unit length.
Explanation:
A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents. High resistivity designates poor conductors.
<span>It gains an electron.</span>
Light because it is an electromagnetic wave and they can travel through the vacuum in outer space.
Density of cylinder is 4.82 g/cm³.
<h3>What is density of a substance?</h3>
Density is the ratio of the mass and the volume of a substance
The density of the cylinder is:
mass of cylinder = 50.12 g
volume of cylinder = πr²h
r = 1.62/2 = 0.81 cm
h = 5.04 cm
volume of cylinder = 22/7 * 0.81² * 5.04
volume of cylinder = 10.39 cm³
Density of cylinder = 50.12 g/10.39 mL
Density of cylinder = 4.82 g/cm³
In conclusion, density of a substance is the ratio of mass and volume of the substance.
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