Which of the following properties must be known in order to calculate the amount of heat needed to melt 1.0 kg of ice at 0ºc?
i. the specific heat of water
ii. the latent heat of fusion for water
iii. the density of water

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.