Which of the following are chemical reactions?

-making caramel sauce
-mixing oil and vinegar to make salad dressing
-pouring chocolate sauce in to milk to make chocolate milk.
-getting a suntan

this isn't multiple choice there is more then one answer

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Which changes of state do the labels represent? a: b: c:

Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear