The critical angle for total internal reflection at a liquid– air interface is (a) if a ray of light traveling in the liquid has an angle of incidence at the interface of what angle does the refracted ray in the air make with the normal? (b) if a ray of light traveling in air has an angle of incidence at the interface of what angle does the refracted ray in the liquid make with the normal?

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.

a.   mass number from atomic number

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer