One approximation of this quantity involves taking the limit of the integral [read slowly] “x to the fourth times e to the x, [pause] over the quantity e to the x minus one squared” in a model of this quantity that (10[1])sets a (10[1])namesake temperature proportional to the cube root of “six pi squared times number density”. Einstein’s model of this quantity with (10[1])a lattice of 3D QHOs fails to account for the cubic temperature dependence of this quantity observed in the Debye (“duh-BYE”) model. This (10[1])quantity’s high-temperature value is three times the ideal gas constant (-5[1])according to the Dulong–Petit law. The adiabatic index is the ratio between this quantity’s constant-volume and constant-pressure forms. For 10 points, one (10[1])calorie per gram (10[2])per degree (10[2])Kelvin is water’s value of what quantity, which measures how (10[1])much heat it takes to increase an (10[1])object’s temperature? ■END■