Electrical energy can be changed into what other types of energy

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.

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole