Answer to Question 1
b
Answer to Question 2
To understand the mass-luminosity relation, recall (1) the principle of hydrostatic equilibrium, which says that pressure balances weight, and (2) the pressure-temperature thermostat, which regulates energy production. A star that is more massive than the Sun has more weight pressing down on its interior, so the interior must have a higher pressure to balance that weight. That means the massive star's automatic pressure-temperature thermostat must keep the gas in its interior hot and the pressure high. A star less massive than the Sun has less weight on its interior and thus needs less internal pressure; therefore, its pressure-temperature thermostat is set lower. Massive stars are more luminous because they must make more energy to support their weight.
Spinnbarkeit is the ability of cervical mucus to stretch a distance before breaking.
Species richness decreases with distance from the source pool.
Dimmer Distant Supernova
Kinetic basis for preferential excision of mismatched nucleotides by a 3’ exonuclease site distant
How to use the discriminant to determine the value of k in a quadratic with one real root
If P(θ) = (√3 /2, -1/ 2), determine the coordinates of P (θ + 90 °) using the unit circle