a star has its total mass given by the expression: 3 where pe is a constant equal to the density at the center of the star and r is the radius at the surface of the star. the density of the star depends linearly on radius as follows: a(r) = ar + b where a and b are constants. a. determine the complete expression for ρ(r) by finding a and b. you may assume spherical symmetry b. assuming the star is in hydrostatic equilibrium, find an expression for the internal pressure as a function of radius, p(r). c. find and expression for the gravitational potential energy of this star, ω, as well as its total internal energy, u.

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

Abird sitting high in a tree is an example of what type of wnergy

According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.