What physical properties affect an object’s gravitational pull?
a) weight
b) size
c) shape
d) all of the above

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?

Is the flow of energy during vaporizing more like the flow during melting or during freezing