Why do the moon phases take two days longer than it takes for the moon to revolve around Earth?

Explain how plate tectonics have changed earth’s surface over time. include the role of plate tectonics in the creation of landforms.

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

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