While we usually assume that the force of gravity is constant, it actually decreases with altitude according to the formula Fgrav = mgr^2_o / r^2, where ro is the radius of Earth, and r is the distance from the Earth's center.
a) Why can we approximate the force of gravity as constant at the surface of Earth?
b) Show that a(r)dr = vdv.
c) If the particle is fired vertically with velocity vo from Earth's surface, determine its velocity as a function of position r. (Hint: use the result of part b)

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

no simpler subs form complex ones. synthesise = make

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

part 1: which substance has a higher solubility?

a

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