Tossup

Description acceptable. Although this quantity doesn’t increase opacity, red stellar populations have higher values of it, making it degenerate with metallicity. Kelvin and Helmholtz were off by many orders of magnitude when calculating the Sun’s (10[1])value of this quantity. (-5[1])Dimensional analysis (10[1])can sketchily (-5[1])justify (-5[2])that a form of this quantity is about one over H-nought. (10[1])Low-mass galaxies that are also [emphasize] low (10[1]-5[1])in this quantity (-5[1])are the main targets of JWST. (10[1])Blue (-5[1])stars (-5[1])have (-5[1])relatively low values (-5[4])of this quantity (-5[4])when (-5[1])leaving the main (-5[1])sequence. Radiometric methods of determining this quantity use the half-life (-5[1])of known isotopes. (10[1])For 10 points, (10[1])the universe’s (10[1])value of what (10[1])quantity is about 13.7 (10[2])billion (10[3])years? (10[1])■END■ (10[22]0[1])

Back to tossups

Buzzes

Summary