What principle encourages us to resolve a set of stimuli such as trees across a ridgeline into smoothly flowing patterns

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

What happens to atoms and chemical bonds during a reaction?

What is the length x of the side of the triangle below? (hint: use the cosine function)