The hubble telescope’s orbit is 5.6 × 10^5 meters
above earth’s surface. the telescope has a mass
of 1.1 × 10^4 kilograms. earth exerts a gravitational
force of 9.1 × 10^4 newtons on the telescope. the
magnitude of earth’s gravitational field strength
at this location is
(1) 1.5 × 10^−20 n/kg (3) 8.3 n/kg
(2) 0.12 n/kg (4) 9.8 n/kg

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.

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by