Three vehicles are traveling at the same speed in the same direction on a highway, as shown in the diagram below. if the position of the front of the white van is -21 m, what is the point of reference?

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.