For the examples below, explain what a physical change or a chemical change has occurred. justify your answer
a. when you mix baking soda and vinegar, carbon dioxide is released.
b. you build a tall sand castle at the beach. after wave washes it over, the sand castle turns into a big pile of sand
c. boiling water turns a raw egg into a hard boiled egg
d. max divided cookie dough into small pieces on a cookie sheet.
e. a loaf of freshly baked bread tastes better and looks much different than a lump of bread dough
f. a glass of water is left in the sun. in the time, the water evaporates leaving the glass empty.

How do the measurements of charge at the different locations on the sphere compare to each other? the charge measurements are different at all locations on the sphere. the charge measurements are virtually not the same at all locations on the sphere except for the charge at the very top and at the very bottom that are equal. the charge measurements are virtually the same at all locations on the sphere except for the charge at the very top. at the top, the conductive sphere has a small disk that is made of different material. the charge measurements are the same at all locations on the sphere. what happens to the charge on the conductive sphere when it is connected to a source of charge such as the electrostatic voltage source? nothing will happen because no charge goes around the surface of the sphere. the charge on the conductive sphere spreads out over the surface of the sphere; being greater in some specific locations on the sphere. the charge on the conductive sphere spreads out uniformly over the surface of the sphere. the charge on the conductive sphere spreads out non-uniformly over the surface of the sphere.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?