Which statements describe the death of stars? Check all that apply.
1) star's final stages of life depend on its mass.
2) Stars die when they run out of fuel.
3) When a star starts to die, its core expands.
4) The outer portion of the star contracts.
5) All stars become black holes when they die.

The chemical effect of the endocrine system is longer lasting than the chemical effect of the nervous system. select the best answer from the choices provided t f

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

Which of the following are not typically included in the periodic table? a. atomic mass b. element symbol c. isotopes d. number of electrons