Aball is thrown upward with an initial velocity of 48 ft/s from a height 864 ft. h = -16t +48t +864 after how many seconds will the ball reach the ground? (i. e. for what positive value of t is h=0? )

The ideal gas model is valid if which of the following conditions is true? the gas density is low. the gas density is high. the temperature is low. the temperature is high. the gas density and the temperature are low. the gas density and the temperature are high. the gas density is high and the temperature is low. the gas density is low and the temperature is high.