Daniel has a sample of pure copper. It's mass is 89.6 grams, and it's volume is 10 cubic centimeters (cm^3). What is the density of the sample?

8.96cm3g

Explanation : To find density, we can use the formula as given below;

density ρ = \frac{mass(m)}{volume(v)}volume(v)mass(m)

Here, we have the mass as 89.6 g and the volume is 10.0 cm^{3}10.0cm3 ,

on calculating we get,

This means that the density of the copper sample is 8.96 g/ cm^{3}8.96g/cm3

temp rises, and expansion

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.