Which of the following is not a model? A. an ant farm
B. a bicycle
C. an atlas
D. a plastic human skeleton
i need help fasttt

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?